Answer:
It prevents salt from flowing in.
Explanation:
so the tubeworm's cell membrane prevents minerals from flowing in and salt is a mineral so it won't allow salt to flow in.
Answer:
it prevents minerals in the water from flowing into the cell
Explanation:
APEX
What can a line graph be used to do? Select the best answer.
O A. Identify positive correlation
B. Identify negative correlation
C. Make predictions
D. Make comparisons
Reset Selection
Answer:
From the choices listed I would say that the answer is (D) make comparisons.
Explanation:
Line graphs are used to track changes over short and long periods of time. Line graphs are used to compare changes over the same period of time for more than one group.
A line graph is used to make predictions. Thus, the correct option is C.
What is a line graph?A line graph may be defined as a kind of chart utilized to illustrate the information that altered over time.
Identification of positive correlation and negative correlation is done by using a scatter plot.
A Line graph is extremely an easy process to make predictions because it illustrates the alterations over a specific period of time.
Therefore, the correct option for this question is C.
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What is enzyme specificity?
Answer:
This is the tendency of enzymes to catalyse a specific set of chemical reactions.
Explanation:
This is enzyme specificity.
4. In the background, the presence of naturally occurring enzymes in fruits and vegetables was discussed. Using your results from this exercise as a basis to guide your thoughts, do you think that cooked, frozen, or raw fruits and vegetables would contain the most active enzymes?
Answer:
The fruits inside do not have enzymes, but if our body when digesting them, if these fruits are cooked they are much easier to digest by our digestive enzymes and if they are raw, digestion will be more laborious since it will have to break more masses chemicals that were not destroyed by cooking.
Regarding freezing, it does not intervene in digestion.
Explanation:
The cooking of vegetables or fruits like meats generates that some chemical unions are destroyed, thus exposing the most internal structures in enzyme activity.
What is the defining characteristic of eusocial population a. If complex communication allows for the efficient transmission of information b. If the distance between social groups is greater than the mean subpopulation census c. if the effective population size is much less than the haploid deficiency value d. if there is complete division of roles within the society particularly with regards to reproduction
Answer:
d. if there is complete division of roles within the society particularly with regards to reproduction.
Explanation:
Eusocial insects are those insects that live in a colony with only some individuals capable of reproducing. usually there is division of labour with different individuals undertaking different roles such as defence or foraging. Examples of eusocial insects are bees, ants and wasps.
Hope it helps.
Statement that explains defining characteristic of eusocial population is D: if there is complete division of roles within the society particularly with regards to reproduction.
Eusocial population usually have extreme task specialization, and this usually help colonies to achieve gathering of resources.At times, due to constraints on independent breeding, they sometimes forgo reproduction.Therefore, option D is correct.
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The central (Haversian) canal that runs through the core of each osteon is the site of ________. adipose tissue and nerve fibers cartilage and interstitial lamellae blood vessels yellow marrow and spicules
Answer:
Blood vessels and nerve fibers
Explanation:
The Haversian canal serves as the bone tissues and it runs through the core of each osteon. The osteon surrounds the Haversian canal and contain structures called lamellae.
These lamella are made largely of collagen fibers and also various network of rich blood vessels and cells which produces blood cells in the body. Nerve cells which helps in the relay of impulses are also present. The rich contents of the bone gives it its strength and durability.
Answer:
The correct answer is: blood vessels and nerve fibers.
Explanation:
Haversian Canals are a group of tubes that are located in the more peripheral region of the bone, known as the cortical bone. The cortical bone is hard and compact and is composed of several concentric layers of bone cells (osteocytes and osteoblasts) that circle around a haversian canal, which contains capillaries and nerve fibers. This structure is called an osteon.
Haversian Canals are very important for the correct functioning of the bone, as they give the cells their needed blood supply and innervation.
About Galileo Galilei : Why was he allowed to serve his sentence from home?
Early in 1616, Galileo was accused of being a heretic, a person who opposed Church teachings. ... Galileo was sentenced to life imprisonment in 1633. Because of his age and poor health, he was allowed to serve his imprisonment under house arrest.
Explanation:
Stem cell transplants may someday be used to treat Parkinson's disease. Researchers are hopeful that these cells would alleviate the symptoms of Parkinson's disease by
Answer:
Researchers are hopeful that these cells would alleviate the symptoms of Parkinson's disease by secreting the neurotransmitter dopamine.
Explanation:
Dopamine is a neurotransmitter released by the brain that plays a role in pain processing at various levels of the central nervous system. This includes the spinal cord, periaduectal gray matter, the thalamus, the basal ganglia, the insular cortex, and the cingulate cortex. Low dopamine levels are associated with the painful symptoms that frequently occur in Parkinson's disease. Parkinson's is generated from a neurodegenerative disorder that mainly affects dopaminergic neurons, responsible for producing and secreting dopamine within the brain. When these neurons degenerate, dopamine levels decrease and the consequences are tremor, muscle stiffness and difficulty making voluntary movements, among others. In Parkinson's disease, there is a loss of dopaminergic neurons and a potential treatment would be that the lost neurons could somehow be replaced. One possibility is to transplant stem cells that differentiate into dopamine-producing nerve cells.
Assume that a cell is carrying out its day-to-day activities. At one point, the nucleotides GAT are paired with the nucleotides CUA. This pairing occurred __________.
Answer:
Explanation:
Yes!
How does epithelial tissue respond to a bruise or wound?
Answer:
Epithelial tissue helps bruises and wounds by reducing the risk of infection.Explanation:
The NADH and FADH2 molecules that are used during the reactions of the electron transport chain are derived from glycolysis, the preparatory reactions, and the citric acid cycle.
a) true
b) false
Answer:
The correct answer is option a) "true".
Explanation:
The electron transport chain that takes place in mitochondria during cellular respiration is interconnected with several other biological pathways in the cell. These pathways include glycolysis, the preparatory reactions, and the citric acid cycle, where NADH and FADH2 molecules are synthesized. In glycolysis and citric acid cycle, 2 NADH and 3 NADH molecules are synthesized, respectively. Regarding FADH2, one molecule of this compound is synthesized per each cycle of the citric acid cycle.
describe some of the basic trends in hominid evolution (brain size, jaw size, language, and manufacturer tools) using at least five sentences.
What are gyres?
1.Large plants that move in circles in the ocean.
2.Large circulating parts of the ocean
3.Large animals in the ocean that move in circles in the ocean.
Answer:
A gyre is a circular ocean current formed by the Earth's wind patterns and the forces created by the rotation of the planet..
Explanation:
follow me plzzz
which question most closely relates to the fosters observation and the collective scientific data on forest
Answer:
The options are:
A. Did a lack of Rain cause the hemlocks to stop reproducing?
B. Are deer eating most of the young hemlocks?
C. Do the young hemlocks have a disease?
D. Why are there so many deer in the forest?
The answer is B. Are deer eating most of the young hemlocks?
Hemlocks are referred to as plants which are considered poisonous when eaten by animals. Since Deers are herbivorous and eats plants alone then the most suitable option will be B which talks about if the deers are eating most of the young hemlocks as a result of it being closely related to the relates to the fosters observation and the collective scientific data on forest.
Caffeine prolongs and intensifies the effects of epinephrine. Which of the following potential mechanisms of action of caffeine is consistent with this effect?
a. inhibits cAMP phosphodiesterase, the enzyme that converts cAMP to AMP.
b. a competitive antagonist of cAMP binding to PKA.
c. stimulates phospholipase Cb.
d. inhibits sarcoplasmic/endoplasmic reticulum Ca 2 + - ATPase.
e. activates PKC.
Answer:
a. inhibits cAMP phosphodiesterase, the enzyme that converts cAMP to AMP.
Explanation:
The phosphodiesterases are a group of enzymes that are capable of breaking phosphodiester bonds such as those between nucleotides in nucleic acids. The Cyclic adenosine monophosphate (cAMP) is a second messenger involved in intracellular signaling pathways. This molecule (cAMP) is hydrolyzed by the cAMP-dependent phosphodiesterase, which catalyzes the enzymatic breakdown of phosphodiester bonds (i.e., hydrolyzing cAMP to 5-AMP). The cAMP levels are modulated by the balance between its generation and the degradation via cyclic nucleotide phosphodiesterase.
The nebular hypothesis suggest that our solar system evolved from a huge
Answer:
The correct answer is - Rotating Cloud.
Explanation:
According to the nebular hypothesis presented by the Swedish philosopher Emanuel Swedenborg in 1734 that says that the Sun and all the other planets of our Solar System evolved from a giant cloud of molecular gas and dust. This huge cloud could have been the result of a shock waves from a supernova or any passing star, but the end result was a gravitational collapse at the center of the cloud.
Thus, the correct answer is - our solar system evolved from a huge Rotating cloud.
The result of mitosis is that the daughter cells end up with the same number of chromosomes that the parent cell had. Another way to maintain the number of chromosomes would be to carry out cell division first and then duplicate the chromosomes in each daughter cell. Do you think this would be an equally good way of organizing the cell cycle? Why do you suppose that evolution has not led to this alternative?
Answer:
No, it will not be good way of organizing the cell cycle, as cell division would occur first and duplicate the chromosomes later, it would lead to unequal distribution of chromosomes in the offspring.
E.g. let the parent cell has chromosomes A, B, C, D so when the cell will divide the chromosomes will be divided in two sets as: (A, B) and (C, D), the daughter cells will have one of these sets each. Later it will be duplicated then the result will be (A, A, B, B) and (C, C, D, D). But ideally it should be A, B, C, D, as this had not happened in the above case so the offspring or daughter cells would have half of the genetic code missing hence they could not survive in nature. That's why natural evolution had not led to this alternative.
If evolution is based upon there being genetic diversity between generations, how does the lack of genetic differences existing between daughter cells created via mitosis impact the theory of evolution
Answer:
See the answer below
Explanation:
If evolution is based upon genetic diversity, it means that evolution in organisms that only reproduce by mitotic division will depend largely on the frequency of random mutation of genes.
The only way that genetic diversity can occur between daughter cells formed from mitosis is if mutation takes place. Mutation general means a sudden change to the gene sequence of an organism.
Without mutation, evolution in mitotic organisms will be non-existence because there are no new genes or alleles being introduced into the gene pool.
In Pennsylvania, wolves have been extinct for many years. They used to feed on white-tailed deer, but not that the wolves are gone, the population of white-tailed deer has exploded. This means that this community:______
a. Was under top down control
b. Was under bottom up control
c. Lacks a fundamental niche for wolves
d. Lacks a fundamental niche for deer
Answer:
The correct answer is a: The community was under top-down control
Explanation:
Top-down control refers to scenarios where superior predators control the structure and dynamic of an ecosystem. These systems are affected by the presence/absence of the superior predator influences all the lower links in the trophic chain.
In the exposed example wolves, that are considered to be the top predators, affected the white-tailed deer populations being the cause of its decrease. As wolves used to feed on white-tailed deer, they kept these populations under control, but once the wolves got extinct, the deer population increased again. Probably, this explosion in the deer´s population also affected its lower link in the trophic chain.
Jose Salazar has been hospitalized following a motor vehicle accident. He has several broken bones, including his left jaw, two ribs on the left side, and a compound fracture of his left leg. According to his medical record, he is 47 years old, his height is 5'9", and his weight is 171 pounds. During the course of his hospital stay, he was diagnosed with a heart arrhythmia. His current medications include lovastatin to lower his cholesterol, an MAO inhibitor to treat depression, and an analgesic to treat his pain. Mr. Salazar's wife also reports that he takes several herbal products including yohimbe, kava, valerian, and St. John's wort. Which herbal product taken by Mr. Salazar may be causing his heart arrhythmia?a. yohimbeb. kava kava onlyc. St. John's wortd. valerian onlye. both valerian and kava kava
Answer:
a. yohimbeb
Explanation:
Heart arrhythmia is a heart disease in which the heart does not work properly. The main cause of heart arrhythmia is yohimbeb which is used as a medicine for increasing sexual desires but this herbal product also has side effects such as causing heart problems such as heart arrhythmia and kidney diseases. So the Jose Salazar should avoid the consumption of yohimbeb in order to control the heart disease.
The highlighted structure contains part of the brain system that maintains cortical alertness. What is the name given to this brain system
Answer:
Reticular formation
Explanation:
The Reticular formation consists of nuclei which are connected together. They are found in the Brain Stem. The Brain stem and Reticular formation are also both found in the Medulla Oblongata.
They however contain rich volume of cells which helps in the cortical alertness and they also help in the control of the activities of the skeletal and some parts of the muscular system.
when enzymes in your body digest your food what type of biomacromolecule is at work
Answer:
Fat, starch, sugars and protein.
Explanation:
Enzymes break these biomacromolecule bcoz cells get energy by breaking them.
Answer: Protein.
Explanation:
Which statement summarizes a change that occurs during photosynthesis?
Answer:
It converts light energy to chemical energy.
Explanation:
Its absorbing sunlight and changing in to chemical energy for the plants nutrients.
During photosynthesis, light energy will be changed into chemical energy.
What is photosynthesis?Photosynthesis was a process used mostly by plants as well as other creatures to transform sunlight into chemical energy which, via cellular respiration, might subsequently be produced to fuel the organism's functions.
What is chemical energy?Chemical energy was the energy that would be generated while chemical substances engage in a chemical reaction but also change into some other substances.
Therefore, during photosynthesis, light energy will be changed into chemical energy.
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a. What are the two genotypes of the grandparents? ________ b. What is the genotype of Jane's husband? ________________ c. What are the chances that Peter is the carrier of the PKU allele that resulted in his having an affected son? _________%
Answer:
a. Rr, Rr
b. rr
c. 0% because its the women who transmits the disorder.
Explanation:
PKU allele is an autosomal recessive disorder which is caused by mutations in both alleles of gene for phenylalanine hydroxylase. Alleles are either dominant or recessive. When two alleles are identical means that mother and father cells are homoozygous recessive. They both are combining the same alleles causing it to have a higher chance of genetic disorder.
Question 21 (5 points)
Which of the following terms describes a collection of hollow cells that implants on
the uterus wall after fertilization, but is not yet differentiated (in other words, all cells
are the same type of cell still)?
Fetus
Haploid
Mitosis
Blastocyst
Answer:
The answer is option D.
Blastocyst
Hope this helps
Answer:
Blastocyst
Explanation:
Once an egg is fertilized by a sperm, it begins to divide by mitosis into a 2, 4, and then 8 celled structure. Eventually, this large collection of cells keeps dividing and becomes a hallow collection of undifferentiated cells called a blastocyst. The blastocyst will implant on the wall of the uterus where it will begin to grow and develop during pregnancy into a fetus.
In the intrinsic pathway, the reaction begins with clotting factors from the _.
Answer:
Clotting factors are circulating in the blood.
Explanation:
In the intrinsic pathway, the body is responding intravascular damage through binding of platelets, exposure of chemicals or even collagen from endothelial membranes. The most of the clotting factors are synthesized by the liver and circulate around the blood stream until they are needed or until they are degraded based off their half lives.
When the platelets start to aggregate they release chemicals and have proteins that can attract the clotting factors. In the intrinsic pathway, clotting Factor XII starts off the cascade. Hope that helped :)
Convert 9.75 millimeters to centimeters. centimeters
Answer:
here,
10mm = 1cm
or, 1 mm=1/10 cm
or, 9.75mm=1/10×9.75cm
=0.975 ..........is the answer
hope it helps..
Answer:
.975
Explanation:
my brain:)
Why are all food service workers required to understand and apply food safety knowledge?
Select one:
a. To prepare the best tasting food possible.
b. To prevent the spread of illnesses through food.
c. To reduce customer injury such as cuts and burns.
d. To reduce the amount of food thrown away due to spoilage.
Answer:
B.
Explanation:
Keeping and understanding food safety knowlege prevents the consumer from getting sick.
which is a type of star system?
A. dim stars
B. galaxies
C. wobbling stars
D. globular clusters
Answer:
D) Globular Clusters
Explanation:
A star system or stellar system is a small number of stars which orbit each other, bound by gravitational attraction. A large number of stars bound by gravitation is generally called a star cluster but, broadly speaking, they are also star systems. A star cluster is a group of stars that share a common origin and are gravitationally bound for some length of time. The two basic categories of stellar clusters are open clusters, also known as galactic clusters, and globular clusters.
Globular clusters is a type of star system.
What is star system?A star system, also known as a stellar system, is a group of stars that circle each other and are held together by gravitational pull. A stellar cluster or galaxy is a huge group of stars that are gravitationally bonded together, however they are also known as star systems. Planetary systems, which comprise planets and other similar bodies, are not to be mistaken with star systems such as comets.What is globular clusters?Globular clusters are clumps of old stars that are firmly packed together. They have a roughly spherical form and contain hundreds of thousands, if not millions, of stars. Astronomers can use them to determine the age of the cosmos or the location of a galaxy's core by studying them.Hence, the correct option is D.
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How did the death of chestnut tree result in the growth of the ecosystem
Answer:
add nutrients to the soil.
Explanation:
The death of chestnut tree result in the growth of the ecosystem because when the chestnut tree dies, the decomposers such as fungi and bacteria start feeding on the dead tree and as a result nitrogenous waste is produced mixed with soil which is the essential nutrient for the plants. These nitrogenous waste is used by the plants to make amino acids and as a result the growth of an ecosystem occurs.
Consider the following DNA molecule: 5' TTC CAT GGA 3' 3' AAG GTA CCT 5' If this molecule were transcribed, what would be the resulting RNA molecule
Answer:
DNA strand: 5' TTC CAT GGA 3'
RNA strand: 3' AAG GUA CCU 5'
Explanation:
From the DNA template, an RNA molecule will be transcribed that is single stranded. So, it will read off the code from the 5' to 3' strand of DNA to create the RNA molecule made of complementary bases, in triplet codons. The enzyme that carries out this function is RNA polymerase.