Calculate the number of oxygen atoms in a sample of scheelite. Be sure your answer has a unit symbol if necessary, and round it to significant digits

Answers

Answer 1

167.77 x 10²¹ molecules of scheelite contains 4 x 167.77 x 10²¹ atoms of oxygen .

Scheelite is a calcium tungstate mineral with the chemical formula CaWO4. It is an important ore of tungsten .They have developed commercial value in the 20th century when tungsten is widely used in alloy steels and electric light filaments.

Scheelite consists of a broad range of colors, from bright orange, golden yellow, yellow-brown, brownish green to dark brown, pinkish to reddish gray, white or can be even colorless. Transparent varieties are notably difficult to prepare as gemstones because of their fragility.

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Related Questions

there are 24 species of hornbills that live in africa, all descended from a common ancestor. there are differences in nesting behavior, feeding morphology, and the habitats in which they are found, which include forests, woodlands, and savannahs. which statement best reflects how ecology and competition could have played a role in diversification of the hornbill lineages?

Answers

During the evolution of hornbills, resource partitioning between various groups may have led to competitive exclusion and speciation.

Origin and diversification of hornbill:

A remarkable group of Palaeotropical birds known for their unusual morphology (casque) and behaviour are hornbills. Significant interspecific variation may be seen in hornbill food, habitat utilisation, distribution, and social structure. Their mutualistic interactions with tropical fruits also contribute significantly to environmental services. Conflicting theories exist regarding hornbills' origin, rate of diversification, and biogeography, but their evolutionary history is still unknown. Although a gradual accumulation of molecular data has revealed intriguing phylogenetic relationships, methodological restrictions and inadequate sampling have left gaps and led to inconsistent results. This is true even though a thorough cladistic analysis of phenotypic data has revealed unresolved taxonomic uncertainties within the family.

As a result, the evolutionary paradigm used to analyze the group's variety is insufficient.

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for a lateromedial view of the tarsal joint of a horse, the cassette shoud be placed in which position?

Answers

For a lateromedial view of the tarsal joint of a horse, Position should be on the medial surface

What is Tarsal joint?

The transverse tarsal joint, also known as the midtarsal or Chopart's joint, connects the hindfoot and midfoot by spanning the foot horizontally in an S-shape. The talonavicular and calcaneocuboid articulations, two synovial joints with a narrower range of motion, make up this composite joint. The talus (talo-) and the navicular bone come together to form the talonavicular joint, which is the most movable of the two (-navicular). The calcaneus (calcaneo-) and the cuboid bone are joined by the calcaneocuboid joint.

Depending on where the foot is positioned, the transverse tarsal joint's specific mobility pattern allows a number of different functions. The navicular and cuboid bones become locked and immovable during weight bearing, allowing the talus and calcaneus to move relative to them. 

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12. what other techniques might be used to identify organisms once the morphological, cultural, and physiological characteristics have been determined?

Answers

Genetic, antimicrobial resistance and immunological tests

What is organisms?

The scientific approach of classifying and naming living things by putting them in groups based on qualities or characteristics in common is called taxonomy. This covers the organism's genetic make-up, morphological (structural) traits, and evolutionary connections to other species.

The Five I's are used to control and describe microbes (inoculation, incubation, isolation, inspection and identification).

Microscopic methods like optical microscopy, atomic force microscopy (AFM), and transmission electron microscopy (TEM) are crucial for assessing these features.

Using behavioral, ecological, and molecular information, researchers were able to distinguish between two species of ants, Camponotus renggeri and Camponotus rufipes, that are closely related.

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what kinds of carbohydrates are found in whole-grain bread, pasta, cereal, wild rice, legumes, sweet potato, butternut squash, beets, beans, and nuts? simple carbohydrates simple carbohydrates complex carbohydrates

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Complex carbohydrates are found in whole-grain bread, pasta, cereal, wild rice, legumes, sweet potato, butternut squash, beets, beans, and nuts.

Carbohydrates are classified as simple and complex. Depending on the food's chemical structure and how fast the sugar is digested and absorbed. Complex carbohydrates are made up of sugar molecules. That are strung together in long, complex chains. They are found in whole-grain bread, pasta, cereal, wild rice, legumes, sweet potato, butternut squash, beets, beans, and nuts. Simple carbohydrates are broken down quickly by the body to be used as energy. This carbohydrates are found naturally in foods such as fruits, milk, and milk products.

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gap junctions, neurotransmitters, paracrines, and hormones are all mechanisms by which cells do what?

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Gap junctions, neurotransmitters, paracrines, and hormones are all communicate through each other.

A neuron produces a chemical signaling substance called a neurotransmitters, which can affect another cell across a synaptic gap. Any important gland, target cell, muscle cell, or organ that receives the signal may also be a neuron. In the synaptic cleft, neurotransmitters are released from synaptic vesicles and can interact with receptors on the target cell. The receptor to which the neurotransmitter binds determines its effect on the target cell. Numerous neurotransmitters are produced from straightforward, abundant precursors like amino acids, which are routinely converted in a restricted number of biosynthetic steps. For intricate neural systems to function correctly, neurotransmitters are crucial. There are more than 100 neurotransmitters that are unique to humans, while the precise number is unknown. Glutamate, GABA, acetylcholine, glycine, and norepinephrine are examples of common neurotransmitters. In neurons, neurotransmitters are frequently synthesized from precursor molecules, which are plentiful in the cell. Among the several classes of neurotransmitters are peptides, monoamines, and amino acids. One amino acid is changed to create monoamines.

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which of the following is least associated with the others? a. horizontal gene transfer b. transformation c. binary fission d. conjugation

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The correct option for the give question is option C. Binary fission is the all separation of the body into some two new bodies. , a process by which the single cell splits are into two cells to multiply

Binary fission, sexual reproduction by separating the body into two new bodies. In binary fission, an organism replicates its genetic material, or deoxyribonucleic acid (DNA), and divides into two parts (cytokinesis), with each new organism receiving a copy of the DNA. Mutilation in biology is the division of one entity into two or more parts, and the reproduction of those parts into separate entities that resemble the original. Usually the dividing body is a cell, but the term can also refer to how an organism, body, population, or species divides into separate parts. Binary fission means "divided in two". This is the simplest and most common method of as-xual breeding.

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based on genetic and genomic analysis, what percentage of each genome is thought to be lineage-specific?

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Surprisingly, these genes make up only about 1-2% of the 3 billion base pairs of DNA. That means 98-99% of our entire genome has to do something other than code for proteins. Scientists call this non-coding DNA.

Her DNA in humans is 99.9% identical to his, and a 0.1% difference actually represents that mutations can occur at millions of different locations in the genome. The human genome is the complete set of human nucleic acid sequences encoded as DNA in 23 pairs of chromosomes in the cell nucleus and in small molecules of DNA found in individual mitochondria. These are the usually treated and be separately as the nuclear and the mitochondrial genomes. DNA is made up of chemical building blocks called nucleotides. These building blocks consist of her three parts:A phosphate group, a sugar group, and one of four nitrogenous bases. To form a DNA strand, nucleotides are attached to the strand with alternating phosphate and sugar groups.

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latisha noticed that in the early evening she begins to have difficulty seeing the vibrant colors in her artwork. which of the following best explains her difficulty?

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The rod cells in Latisha's eyes are not functioning properly and she is not able to see the colors as a result.

Our eyes have a lot of important substituent organs as well. In these, the cone and rod cells are extremely important as they are the ones that detect colors. Cone cells and rod cells are both cells that respond to the different wavelengths of different cells.

Cone cells respond to colours in bright light. Rod cells work in dim light. In the given question, we have been told that latisha faces the problems during early evening. This is when the lights are dim. This means that her rod cells are not working properly.

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When are clinicians allowed to consult with other clinicians about a client’s diagnosis?.

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When the clinician needs help in order to treat their patient.

Why might a therapist offer a diagnosis to a patient?

The diagnosis is a tool that enables her to comprehend how she can first assist her clients and that directs her interventions and therapeutic strategy as the course of therapy moves forward. Additionally, it can lower the cost of receiving mental health treatment.

Therapists may offer a diagnosis why?

To work in the mental health industry, therapists need master's degrees and authorization from their licensing authorities. A treatment plan is created by therapists who also provide mental health diagnoses. If they have misrepresented themselves, it might be appropriate to provide the correct diagnosis. A patient has a right to information about their health so they can advocate for themselves or make sure they are getting the best care possible.

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48) incandescent light bulbs, which have high output of red light, are least effective in promoting a) photosynthesis. b) seed germination. c) phototropism. d) flowering. e) entrainment of circadian rhythms.

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Incandescent light bulbs, which have high output of red light, are least effective in promoting c) phototropism.

In the field of biology, phototropism can be described as the movement of parts of plants towards or away from light. Generally, the shoots of a plant are considered to be positively phototrophic as they move toward the light. On the other hand, roots are considered to be negative phototropic as they move away from light.

The red light that is present in incandescent light bulbs is the light that shows the least amount of effect of phototropism. This is because the pigments present inside the plant cells do not have a signal for the red light. Yellow light is the most favorable for plants to show phototropism.

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which of the following statements about west nile virus and the current epidemic (zika virus) is true? group of answer choices zika is spread to humans by mosquitos while west nile is spread by crows there is no vaccine or treatment for both zika virus and west nile virus both zika and west nile are endemic to the middle east

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option C. Is true. The Middle East is home to both West Nile and Zika. The Middle East is home to both West Nile and the Zika virus.

Although the Zika, dengue, and yellow fever virus all belong to the same genus as the West Nile virus, the majority of infected individuals show no signs of the illness. Those who do exhibit symptoms may have fever, body aches, vomiting, and diarrhea, although they often fully recover. Zika is one of the mosquito-transmitted virus that can have devastating effects on pregnancy and childbirth, and about 1 in 150 infected individuals get a serious sickness that can occasionally be deadly. Zika can cause newborns to be born with microcephaly, which is a smaller-than-normal head size, and other congenital deformities, even though most infected individuals have no symptoms and those that do are typically mild. Along with other pregnancy issues, it can potentially result in miscarriage and preterm birth.

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what is the significance of diffusion and osmosis in the transport of materials across a cell membrane? include a discussion of water potential in your answer.

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While osmosis aids in the absorption of water and other liquids by the plants, diffusion aids in the passage of other molecules, and both thus aid in the process of photosynthesis. Both procedures aid in the production of vital nutrients and energy for plants.

Over a semipermeable membrane, osmosis is the process by which solvent particles are transferred from a diluted solution into a concentrated solution. The solvent travels in order to dilute the concentrated solution and balance the concentration on each side of the membrane. Diffusion is the movement of particles from one area of higher concentration to another of lower concentration. Overall, the medium's focus is equalized for all participants. A higher water potential area always has a flow of water to a lower water potential area. Osmosis rate and water potential are thus tightly related. If a solution has a large water potential, osmosis will happen (low solute concentration). When temperature and pressure are held constant, water potential is the system's water's potential energy when compared to pure water.

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How many times does a restriction enzyme cut a double stranded piece of dna at a given restriction site?.

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Only one or a few restriction sites can be recognized by each restriction enzyme. A restriction enzyme will cut a double strand of DNA when it locates its target sequence.

A restriction enzyme cuts how many times?

According to statistics, an enzyme makes an average of one cut per 4n base pairs, where n is the length of the recognition site. As a result, a DNA molecule's likelihood of containing one or more restriction sites increases with length.

Do restriction enzymes digest DNA with two strands?

Restrictions enzymes often cleave DNA that is double-stranded. Different DNA sequences are recognized by different restriction enzymes, and depending on the enzyme, cleavage can take place either close to or far from the recognition region.

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the depolarization of membrane potential causes which of the following changes to occur across plasma membrane? question 3 options: the cytosolic side of plasma membrane develops - charge while extracellular side develops charge the cytosolic side of plasma membrane develops charge while extracellular side develops - charge both cytosolic and extracellular side develop charge both cytosolic and extracellular side develop - charge

Answers

The cytosolic side of the plasma membrane acquires a positive charge as a result of the depolarization of the membrane potential, whereas the extracellular side of the plasma membrane develops a negative charge.

The differential in electric potential across a cell's plasma membrane is known as membrane potential.

A membrane is considered to be polarized when it has a positive charge on the extracellular side and a negative charge on the cytosolic side.

The distribution of charge across the membrane changes during depolarization, which happens when the membrane potential becomes less negative.

As a result, the extracellular side acquires a negative charge, whereas the cytosolic side acquires a positive charge.

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The cubes below are models of cells made of a jellylike material. One cube is
intact, and the other has been cut into eight smaller cubes.
1 cm
1 cm
Which statement is true for cells represented by these models?
A. There is more total surface area on the eight smaller cells than
there is on the one large cell.
B. There is more total volume in the eight smaller cells than there is
in the one large cell.
C. There is no difference in the ratio of the surface area to the
volume between the large cell and one of the eight smaller cells

Answers

(C) There is more total surface area with the eight smaller cubes than there is in the one large cube.

What is Surface area?

The surface area of an object refers to the overall space filled by its surfaces. Using the formulas, it is simple to determine the surface areas of various 3D shapes in geometry.

What is Cube?

A solid shape with six square faces is called a cube. Because every square face has the same side length, each face is the same size. A cube has 8 vertices and 12 edges. An intersection of three cube edges is referred to as a vertex. The size of a cube's exterior surface is used to determine its overall surface area. The surface area of a cube is equal to 6, the area of one face since a cube has six square faces, each of which is the same size.

(C) There is more total surface area with the eight smaller cubes than there is in the one large cube.

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PLEASE HELP!!!!

Some skin cells of an ostrich differentiate and organize together
into feathers, which adult males use in courtship.
Which term names a group of similar cells working together?
A cell group
B organ
C tissue
D organ system

Answers

The term that described a group of similar cells working together is tissue.

What are tissues?

In biology, tissue is a word used to describe a group of similar cells working together for a common goal. In other words, tissue is made up of 2 or more similar cells working together as a unit.

Tissue represents the second level in the organization of life, after cells. Cells are the basic unit of life, followed by an aggregation of cells working as a unit.

After tissues come organs. Organs are a level above tissues as they are made of different but similar tissues working together as a unit. The next level is the organ system. A system is made up of 2 or more organs working together to form a system such as the excretory system, digestive system, etc.

Thus, the term that best represents a group of similar cells working together as a unit is tissue.

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two species are not likely to live together in the habitat for a prolonged period of time if they have the same manner of using resources. this is : (mark all that apply)

Answers

Two species are not likely to live together in the habitat for a prolonged period of time if they have the same manner of using resources, this is because of interspecific competition.

Any resources in a habitat are limited hence if species share common limited resources in a habitat they have to compete with others, this will be negative for both species at last only one species can survive in that habitat another one will go extinct. If two species need to occupy a habitat by sharing common resources they have to undergo resource partitioning. In this method, two species will form small microhabitats to share limited resources without competition. Microhabitats of one species will not be inhabited by other species. Resource partitioning can also be done by having different feeding times.

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A mutation occurs in a population of rabbits affecting ear length. After multiple generations, 30% of the population exhibit the new recessive phenotype for short ears. Use the Hardy-Weinberg equation to determine the genotypic frequencies of the rabbit population. Show all work in your answer.

Answers

We'll align the following generation of multi-state scientific standards with two alleles in a population of wild rabbits represented by dried beans. Hardy-Weinberg Allele frequencies in a given population over time can be compared using equilibrium.

In Hardy-Weinberg, what are P and Q?

P stands for population prevalence of the dominant allele. In the population, q equals the frequency of the recessive allele. p2 = homozygous dominant individuals as a percentage. the proportion of homozygous recessive people (q2). Individuals with heterozygotes are represented by 2pq.

How do you calculate Hardy-Weinberg with 3 alleles?

Hardy Weinberg Calculations for Multiple Alleles at a Single Locus. For a gene locus segregating more than two alleles, the frequency of each allele is the frequency of its homozygote plus 1/2 the sum of the frequencies of all heterozygotes in which it can occur.

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A microsleep is dangerous because __________. a. the loss of control can lead to accidents b. a person goes into a coma during a microsleep c. microsleeps occur only during the early evening d. there is no cure or treatment for microsleeps

Answers

Microsleeps are risky since the loss of control might result in mishaps. Microsleep can occur when a person is driving, which makes it very hazardous.

What exactly is microsleep and why is it important?

Microsleep is often regarded as sleep periods that last 15 seconds or less 7. People who experience microsleep episodes lose conscious control over how they behave. By examining the phenomenon in both humans and animals, scientists are trying to better understand what happens in the brain during microsleep. 9.

How should microsleep be handled?

It's critical that you get adequate shut-eye at night in order to treat and prevent instances of microsleep. Adults need between seven and nine hours of sleep per night to function properly.

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Answer:

A) the loss of control can lead to accidents.

Explanation:

e2022

You look at 80 black and tan sordoria asci under the microscope and count 45 non-recombinantasci. What is the distance, in map units of the color gene from the centromere? Round to the nearest whole number, OOO QUESTION 4 What are the steps in a single PCR (Polymerase Chain Reaction) cycle? 1. Elongation II. Annealing III. Amplification IV. Denaturation V. Extension LILY IV, INI, LII IV. II. V IV,

Answers

The distance in map units of the color gene from the centromere is 22. The steps in single PCR are IV, II , V,

Calculations for the distance in map units can be calculated as follows:

Total no. of asci = 80

Number of non-recombinant asci = 45

Number of recombinant asci = 35

Recombination frequency = (35/80) x 100 % = 43.75%

Distance in map units = Recombination Frequency / 2  

= 43.75/2 = 21.875  

= 22

Polymerase chain reaction shortened as PCR is a laboratory method for hastily producing (amplifying) tens of thousands and thousands to billions of copies of a particular phase of DNA, which could then be studied in more detail. The 3 sequential steps of PCR are

a. Denaturation

b. Annealing

c. Extension

There are no steps in PCR called elongation and amplification.

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Which of the following is NOT a reason why our bodies needs trillions of small cells:
1] Cells die and we need replacements.
2] Cells are specialized so we need different types.
3] Cells are small so they can move materials in and out easily.
4] Cells have need to be able to reproduce faster and faster.​

Answers

Answer: the correct option would be number 1!

Explanation:

a predatory spider that feeds exclusively on herbivorous ants, in a food web, would be an example of a(n) that is part of the trophic level.

Answers

A predatory spider that feeds exclusively on herbivorous ants, in a food web, would be an example of a(n) Carnivore that is part of the Third trophic level.

An herbivore is a structure that generally feeds on plants. Herbivores range in breadth from tiny bugs to degree aphids to big, awkward mastodons. In a food web, a predatory spider that only eats herbivorous ants is an example of a carnivore.

The trophic level of a structure is the position it keeps in a feeding relationship among organisms. The trophic level of a creature is the number of steps it is from the start of the food chain. Monitoring the trophic levels is essential so concerning gain an understanding of the interrelationships middle from two points animals in addition to the environmental processes that happen inside an environment.

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Now that you have seen the difference in the smear preparation after simple methylene blue staining, which of the following is correct regarding your smear now?
The addition of methylene blue helps show helps show the intact appearance and localization of the cells, compared with no staining
The addition of methylene blue makes visualization some bacterial cell characteristics more apparent, compared to no staining
Addition of methylene blue highlights the bacterial cell nucleus and organelles that were difficult to discern without stain
The addition of methylene blue helps visualize the shape and arrangements of bacterial cells that were difficult to discern without stain.

Answers

The addition of methylene blue: helps show the intact appearance and localization of the cells, compared with no staining, helps visualize the shape and arrangements of bacterial cells that were difficult without stain

It can be added to a solution to dye RNA and DNA for visual analysis. Wine Microbiology Application: Methylene blue staining can be used to determine cell mortality. When methylene blue stain is applied to a sample, a healthy cell causes the stain to become colorless. Methylene blue acts as an alternative electron acceptor, reversing NADH inhibition of hepatic gluconeogenesis and inhibiting the transformation of chloroethylamine into chloroacetaldehyde, as well as inhibiting multiple amine oxidase activities, preventing the formation of chloroacetaldehyde.

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the first fossils of animals with hard parts appeared about 541 million years ago. what percentage of geologic time does the fossil record represent? express your answer as a percentage with two significant figures

Answers

The percentage of geological time is 20%.

What are fossil records?

Fossils are the remains or signs of extinct living things. Examples include fossilized bones, shells, exoskeletons, animal or microbe imprints in stone, amber-preserved artifacts, hair, petrified wood, oil, coal, and DNA traces.

The collection of all known and undiscovered fossils during a period of time is known as the fossil record. Scientists can learn more about the Earth's past through fossil records. To understand the evolution of living things, fossil records are used. Understanding how life has evolved over time is useful.

Hence the answer is the geological time that has been mentioned in the question represents 20%.

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Match the region of the spinal cord with the number of spinal nerve pairs that are associated with it.
i) Five
ii) One
iii) Eight
iv) Twelve
a) Cervical
b) Lumbar
c) Coccygeal
d) Thoracic

Answers

The given regions of the spinal cord are matched with the associated number of spinal nerve pairs.

The spinal cord of the human body is protected by the vertebral column and helps the body stay upright by providing proper support. It consists of five sections, the component regions, which are the cervical, lumbar, sacral, coccygeal, and thoracic. It is the main pathway of communication between the body and the brain.

This is how it will get matched.

a) Cervical - iii) Eight

b) Lumbar - i) Five

c) Coccygeal - ii) One

d) Thoracic - iv) Twelve

Hence, this is how it works out.

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which one is the best ans​

Answers

D porque es la mas marcada que esta

Answer:

A. and D.

Explanation:

The spleen is responsible for producing leukocytes, which are white blood cells that help fight infection. When the spleen is swollen, it means that there is an increased number of leukocytes in the body. This can lead to a higher risk of infection and disease.

In addition, the spleen filters the blood and removes old or damaged red blood cells. When the spleen is swollen, it is not able to filter the blood as effectively, which can lead to blood clots.

from what you learned in the video, how does blood glucose level change (or not change) in a non-diabetic human?

Answers

Answer:

it increases or decreases

Explanation:

which of the statements is accurate? the same amount of oxygen enters the blood through diffusion as is transported by circulation. larger, more complex animals and smaller, simpler animals rely on bulk flow and diffusion to deliver oxygen to their cells only oxygen, not carbon dioxide, moves across the respiratory surface by diffusion. circulation requires a pump to generate pressure to drive flow, whereas ventilation does not. circulation requires a pump to generate pressure to drive flow, whereas ventilation does not.

Answers

The same amount of oxygen enters the blood through diffusion as is transported by circulation. This statement is accurate.

Circulation requires a pump to generate pressure to drive flow, whereas ventilation does not. This statement is false. Atmospheric pressure drive pulmonary ventilation. The same amount of oxygen enters the blood through diffusion as is transported by circulation. This statement is true. Larger, more complex animals and smaller, simpler animals rely on bulk flow and diffusion to deliver oxygen to their cells only oxygen, not carbon dioxide, moves across the respiratory surface by diffusion. This statement is false, since carbon dioxide also move across by diffusion.

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5. what gas were you measuring with the labquest that was being produced by the plant in photosynthesis? how did this result change over time?

Answers

Infrared spectroscopy using an infrared gas analyzer is used to measure the entering and exiting CO2 from the leaf chamber. The difference provides us the amount of CO2, from which we can compute the rate of photosynthesis.

How does the volume of gas created in a process become measured?

A chemical reaction's volume of gas can be evaluated by collecting it in an inverted container filled with water. The gas pushes water out of the container, and the amount of liquid displaced is proportional to the amount of gas.

Enclosing a leaf in a closed, transparent container and monitoring the drop in carbon dioxide content as a function of time is how the photosynthetic rate of a leaf is assessed.

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la structure des mitochondries

Answers

Answer:

this is the answer

my hombre

Explanation:

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