Answer:
When a neuron is depolarized the inside of the neuron becomes more positive by decreasing the difference between the outside and the inside when the neuron was at rest.
This is due to more Na+ influx into the axoplasm with the positive charges which reverses the negative charges left behind by the K+ leaking out of the axoplasm, which makes it to be deficient in positive charges and therefore negative.However, depolarization with the influx of Na+ with its positive ions, reverses this and makes the inside positive,
Explanation:
Why is the Calvin cycle considered a dark reaction
Answer:
because it's the part that doesn't need energy from the sun to happen. The Calvin cycle takes place within the stroma of the chloroplast.
Explanation:
Answer:
The Calvin cycle can occur in the absence of light.
The Calvin cycle requires ATP and NADPH.
Explanation: See Above
Which term describes erosion? C- transport solid materials A.creates small particles B.hardens rock fragments C.transport solid materials D.dissolves rock components
Answer:
c)
i took the test:)
Explanation:
The term describes erosion is "transport solid materials".
What is erosion?The process of removing soil, rock, or dissolved material from one area on the Earth's crust and moving it to another, where it would be deposited, is referred to as erosion.
What is solid?Several of the four basic states of matter is called solid. A solid's molecules are generally tightly packed together and have the smallest kinetic energy.
Therefore, the term describes erosion is "transport solid materials".
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Make a prediction: During the first trial, you will not be able to see how many people have the disease until the end. If no students are immune, how many do you think will have the disease at the end? __________ out of 20
Answer:
all 20
Explanation:
It is impossible to know how many individuals will have the disease at the end without knowing other factors such as the condition where the subjects are being held, trial specifications and safety measures, etc. Based on the information provided, the best prediction that can be made is that all 20 subjects will have the disease. This is because since none of them are immune the disease will spread between the patients/subjects through contact or testing equipment.
Answer:
I put 17 and it didn't say it was wrong.
Explanation:
uses of gene cloning in the production of human insulin
Answer:
what's gone cloning tho?
what process can cause water in aquifers to become brackish and unusable for agriculture?
A) volcanic activity
B) eutrophication
C) erosion
D) groundwater infiltration
Answer: Groundwater Infiltration
Explanation:
Groundwater infiltration cause seawater to flow into dried-out aquifers that were used for drinking water. This makes these aquifers unusable for agriculture.
magine that the animal body produced sperm and eggs with mitosis instead of meiosis. What chromosome number would the autosomes of the third generation have if the first generation had four chromosomes
Answer:
sixteen chromosomes
Explanation:
this is because the
what is the importance of mastication during digestion
Mastication is the process by which food is crushed and ground by teeth. It increases the surface area of foods to allow a more efficient break down by enzymes.
Which describes an atom that has fewer neutrons than protons and more electrons than protons? negative compound positive compound positive ion negative ion
Answer:
Negatively charged ion
Explanation:
Negatively charged ions are called anions and they have more electron than than protons and more protons than nuetrons.
When an atom has fewer neutrons than protons and more electrons than protons, such an atom is said to be an anion. Hence, it is negative ion.
Depending on the number of proton and electron, there are 3 types of atoms:
Neutral atoms in which the proton and electron numbers are balancedCation in which the proton number is more than the electron numberAnion in which the electron number is more than the proton numberIn this case, the atom has more electrons than protons and, therefore, is an anion. The excessive electron makes such atom to be negatively charge.
Therefore, an atom that has fewer neutrons than protons and more electrons than protons is a negative ion.
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A flask containing 100ml of YNB broth was inoculated with approximately yeast cells. The flask was incubated at 37 degrees Celsius (100rpm). Samples were periodically collected and their absorbance (optical density-OD) was measured:
Using the given data (shown in photo) calculate the doubling time of this microorganism (FIRSTLY, you have to determine the exponential phase!)
Answer:
The time it takes for the yeast population to double is 1 hour.
Explanation:
Convert the OD to an approximation of the number of cells present in the broth. Do this by multiplying the OD value with 3 x 10^7.
The exponential phase of growth for the yeast cells is from
time t = 0 hours to time t = 5 hours
In many popular fictional movies and books, future projections of the earth (and other fictional planets) show a world devoid of plants, with civilization bustling with activity throughout a worldwide city of skyscrapers hundreds of stories high. Based on your reading about photosynthesis and cellular respiration (Chapters 9 & 10), is this future world possible? Explain why it is or is not possible in terms of energy flow in the biosphere.
Explanation:
Cellular respiration and photosynthesis are two important physiological processes which formed the basis of life on Earth.
Evolutionary studies have shown that process of photosynthesis evolved earlier in organisms which led to the production of oxygen. This led to the formation of aerobic cellular respiration in organisms.
In the given, a world devoid of the plant is not possible because the plants perform the role of primary producers that is they utilize the available carbon dioxide and water and form the first stable energy molecule called glucose.
This glucose is broken down by the process of cellular respiration to further usable form. These two processes maintain the flow of energy on Earth.
Thus, without these two processes, the fictional world will not be possible.
Explain the concept of functional specialisation and describe two brain areas that exhibit functional specificity
Answer:
Functional specialisation explains how the two cerebral hemispheres are specialized in different types of mental activity.
Explanation:
The nervous systems of all animals have in common a number of basic functions, the most notable of which are control of movement and analysis of sensation. What sets the human brain apart is the variety of more specialized activities it is capable of learning and the integration and control of the different functions. In 90% of the population the left cerebral hemisphere specializes or controls the ability to speak and write, and the ability to understand spoken and written language. In the remaining 10%, the right hemisphere or both hemispheres dominate spoken or written language. The right cerebral hemisphere perceives tactile stimuli and spatial vision relationships better than the left hemisphere. Another area, the posterior-parietal lobe is related to the tactile abilities, it is particularly involved in the abilities to name and point out the parts of the body, one's own and of others, as well as in the abilities to name, distinguish, recognize or draw the fingers of the hand. The parietal lobe is particularly involved in perceptual accuracy in locating stimuli, in estimating line orientation (parietal-frontal lobe) and in the ability to estimate the number of stimuli presented in the central visual field.
Which best describes homeostasis
The molecules in the image below are able to move across the cell
membrane through channels in the membrane proteins. The cell does not use
any energy to move the molecules down the concentration gradient. What
kind of transport is the cell using?
Answer:
A
Explanation:
the frequency of down syndrom increase with
the age of parents ?
Answer:
See below
Explanation:
Researchers found that the rate of Down syndrome among parents over 40 was 60 per 10,000 births, which is six times higher than the rate found among couples under 35 years old.
Hiking in the snowy woods, you peek inside a cave and encounter a hibernating grizzly bear! Its metabolic rate seems to be very low. What do you predict is the predominant type of reaction occurring in this bear?
Answer and Explanation:
Dormancy is a period in an organism´s biological cycle in which its growth, development, and physic activity gets suspended for a period of time. This causes a drastic reduction in metabolic activity, allowing the organism to conserve its energy. Dormancy is closely related to environmental conditions, and it is considered to be an adaptation mechanism by which organisms respond to extreme conditions.
Hibernation belongs to this dormancy process, in which animals progressively decrease their metabolic rates and their body temperature is held a few degrees over the ambient temperature. During hibernation, all functions are reduced: cardiac rime, respiration, renal function, and etcetera.
Before hibernating, bears eat a huge amount of food because this energy is what will keep them alive while hibernating. This action is known as hyperphagia, and while doing it, bears accumulate fate in their tissues. As these animals need to maintain the energy balance and metabolic health, they make use of these reserves. The nutrients excess will turn into triglycerides, that the animal will use to store in the fatty cells. There are several elements involved in the process, such as sugar, amino acids, glycerol, among others.
The fatty acid catabolism is the predominant reaction that occurring in this bear. Option C is correct.
Hibernation:
In this condition, animals decrease their metabolic rates and their body temperature is increased a few degrees over the ambient temperature. During hibernation, the heart rate, respiration and renal function is reduced.
The bears hibernate in the winter because of the lake of food outside. Hibernation help them to stay alive even in the no food is available for few months.
Before hibernation, bears eat a huge amount of food and store a lot of fat this fat provide a constant supply of energy during hibernation.
Therefore, the fatty acid catabolism, provide the energy during hibernation of bears.
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An unfertilized egg cell has six chromosomes. After fertilization, how many chromosomes should the zygote have?
Answer:
12 chromosomes, because the basic (haploid) number of chromosomes is 6 (n: 6)
Explanation:
The unfertilized egg contains a basic (haploid) number of chromosomes (n), being in this case 6. In humans, for example, the gamete haploid cells have a basic n content of 23 chromosomes, while in somatic cells this DNA amount is duplicated (2n), being therefore 46 chromosomes that are organized into 22 pairs of autosomal chromosomes and two sex chromosomes (X and Y).
Which natural resource is formed from the deposition of sedimentary rocks?
The answeris Coal to this answer
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Two solutions are separated by a semipermeable membrane that is permeable to potassium but not chloride or sodium ions. Solution A on the left contains a solution that is 100 mM potassium, while Solution B on the right has a concentration of potassium chloride of 1 mM. There is an electrode in both solutions, and a comparative assessment of voltages between the two compartments is being made. The investigator doing the study decides to call side B ground potential (or, in other words, defines it as 0).
A. What is the value for the chloride equilibrium potential in this condition?
B. In one sentence, describe why it has a positive or negative value. C. What would be the value of the chloride equilibrium potential? (show how you calculate this) D. What is the voltage of side B relative to side A? E. Does the chloride equilibrium potential contribute significantly to the voltage actually being measured by the investigator? Why or why not (one sentence)?
Sleet forms from which type of precipitation?
snowflakes
ice crystals
rain droplets
Snow
I NEED TO KNOW ASAP
Answer:
rain droplets
Explanation:
Answer:
rain droplets
Explanation:
7. Suppose you were culturing a population of bacteria at 15 degrees Celsius and then raised the temperature of the culture to 37 degrees Celsius. What effect do you think this might have on the fatty acid composition of the membrane? On the transition temperature of the lipid bilayer? On the activity of membrane desaturases?
Answer:
See below
Explanation:
An increase in the temperature will result in greater fluidity of the lipid bilayer membrane, since the unsaturated fatty acids are increased. The membrane tends to be stiff at lower/colder temperatures.The transition temperature refers to the temperature at which the membrane goes from solid to liquid state, which will be raised in this case. This is due to the increase in saturation of fatty acids.The activity of the enzymes membrane desaturases will decrease under these conditions.Anterior lobe of pituitary gland is
Answer:
The anterior lobe makes up about 80% of the pituitary gland. It regulates growth, metabolism, and reproduction through the hormones that it produces.
Explanation:
The production of these hormones is either stimulated or inhibited by chemical messages sent from the hypothalamus to the pituitary.
Snowshoe hare and Canadian lynx live in the boreal forest of Canada. The snowshoe hare is the main prey species of the Canadian lynx. They usually live 1 to 2 years and have four to six offspring at one time. The Canadian lynx is a large cat, which lives up to 15 years and has one to four cubs each year. In spring when vegetation is plentiful, the hare population increases quickly. When the hare population becomes more numerous, they are easy to track and catch, and the Canadian lynx population increases. The Canadian lynx hunts the snowshoe hare and causes their population numbers to drop over time.
When the hare population increases, it is easier for the lynx to find and take a member of that population. This is an example of a:_______.
a) density-independent factor
b) community factor
c) growth factor
d) density-dependent factor
The correct answer is D) Density-dependent factor
Explanation:
In ecosystems, different factors regulate the population of living beings and preserves the natural equilibrium. These factors are commonly classified in density-independent factors and density-dependent factors based on whether these are related to the density of a population. In the case of predation (animals hunting others), this is considered a density-dependent factor because it increases or decreases depending on the size of a population.
For example, in the case of hares and lynxes, the predation increases as the population of hares increases because this makes it easier for lynxes to hunt on hares. Also, this increases the availability of food for the lynxes. Besides this, this regulates the population of hares by preventing overpopulation. Thus, this situation is an example of a density-dependent factor.
Which of the following hormones is synthesized in hypothalmus and secreted from pitutary? Vasopressi or adrenocorticotropic hormones
Answer:
Vasopressin
It is synthesized in the hypothalamus and then secreted by the posterior lobe of pituitary gland
Classification of organisms into three domains is based on:
A) the presence of a cell wall
B) the number of cells in the organism
C) cellular organization
D) nutritional requirements
Answer:
C
Explanation:
cellular organization is the components that make up the cell and how they are arranged inside it. Each component, called an organelle, performs a specific function that is vital for the cell.
The Bacteria, Archaea, and Eukarya are the three domains of the classification. The cellular basis of the classification of the three domains. Thus, option C is correct.
What is the cellular organization?The cellular organization is the arrangement of the cells that are the smallest unit of the organism. The cells of the body make groups at the hierarchical level and perform a specific function.
The domains are not classified based on the cell wall as the animal and plant cells are grouped in the eukarya together. They are also not organized based on the number of cells as bacteria and Archaea both are single-celled.
The domains are not classified based on the nutritional requirements as the modes of nutrition varies in the eukarya domain itself and not just the two other domains.
Therefore, option C. cellular organization is the basis of domain classification
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somebody help me please
Answer:
1. evolution
2. variation
3. competition
4. natural selection
Explanation:
Which of the following factors might cause checkpoint genes to interrupt cell division? Check all that apply. Neurological signals sent from fear responses in an organism tell the cell to stop. The cell's DNA has been damaged somehow. The cell's DNA was replicated incorrectly.
Answer:
Neurological signals sent from fear responses in an organism tell the cell to stop. The cell's DNA has been damaged somehow. The cell's DNA was replicated incorrectly.
Explanation:
All the three options given can cause checkpoint genes to interrupt cell division.
Checkpoint genes are transcription genes that control cell cycle and sense defects during cells processes like DNA replication, segregation e.t.c and create response till the defects is repaired in the DNA. The important of checkpoint is that it ensure enough nutrients are available to support for division, ensure that the DNA has not been damaged, ensure that cells DNA is copied correctly and make sure cells have enough RNA for their protein synthesis.
Checkpoints genes can interrupt cell division if the dna is damaged, Dna is copied incorrectly and neurological signal sent from fear responses in an organisms tell the cells to stop.
Answer:
The cells DNA has been damaged somehow and The cells DNA was replicated incorrectly
Explanation:
sometimes, these checkpoint genes are mutated or damaged and, thus, are unable to tell a damaged cell to stop dividing. When this occurs, the damaged cell gives rise to many damaged cells, which in turn create more damaged cells. These dividing cells form a NEOPLASM
What persuasive technique does Antony use when he mentions Caesar’s will but then refuses to read it?
The persuasive technique he uses is anticipation.
Answer:
He is using Anticipation.
Explanation:
Antony brings up the fact that Caesar has a will made, but chooses not to bring it up, as it really would not help sway the audience.
thread like structure form body of fungus called....?
Answer:
The answer is Hyphae
Explanation:
The body of fungi is very simple known as mycelium
Answer:
Most fungi grow as thread-like filaments called hyphae. A mass of hyphae make up the body of a fungus, called a mycelium.
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Explanation:
ATP is the molecule that is used to provide energy necessary to power cellular functions, and as a result, it is often called the "energy currency" in the cell. How might this "energy currency" be saved; meaning, what organic molecule can be produced and later used to provide ATP? And what organic molecule might be considered the paycheck; the molecule that is "cashed" in order to get ATP quickly? Explain both your answers.
Answer:
There isn't a single molecule which is metabolized to produce energy.
Explanation:
Since any organic compounds such as sugars, fats, or proteins may be used. However, the most common one is glucose sugar.
Answer:
What type of energy is stored for later use?
Potential energy is stored energy and the energy of position. Chemical energy is energy stored in the bonds of atoms and molecules. Batteries, biomass, petroleum, natural gas, and coal are examples of chemical energy
Explanation:
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N. If both children are of blood type M, list all of the possible parental phenotypes
Answer:type A
Explanation:
Possible parental phenotypes could be mother with blood type A Rh positive and MN or MM while the father will have blood type B Rh negative and MN or MM type.
What is blood typing in humans?Blood typing is a method to tell what type of blood group or blood an individual has. Blood typing is done so a person can safely donate hos or her blood or receive a blood transfusion from another person. It is also done to see if a person have a substance called as the Rh factor on the surface of the red blood cells.
Blood typing in humans is an example of codominance and multiple allelism. Blood group A and B are codominant and O is recessive allele. Rh negative is recessive over Rh positive blood group. A third gene for the MN blood group is codominant, in which M and N are codominant.
In the given question, both the children are of blood type M. In this case, M and N are codominant over each. Therefore, the possible parental combinations can be MN × MN or MM × MN.
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