Answers
Related Questions
The Rh factor is also known as the
antigen.
A. monoclonal
B. polyclonal
C. D
D. X
E. AB
Answers
Answer:
Explanation:
Option E is the correct answer
Answer:
C. D
Explanation:
RBCs that are Rh positive express the one designated D (RhD antigen).
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 From which geological era are all fossils most commonly found
Answers
Answer:
Phanerozoic Eon
Explanation:
This last point in time is the start of a division of geological time called the Phanerozoic Eon. Phanerozoic means “visible life”, and is the time in which fossils are abundant.
A postsynaptic neuron has an RMP of -70mV and a typical threshold of -55mV. It has three presynaptic inputs-from neurons X, Y, and Z. Stimulation of
neuron X causes the postsynaptic neuron to depolarize by 0.5 mV. When X and Y are stimulated simultaneously, the postsynaptic neuron depolarizes by
1 mV, If X fires 10 times and Y fires 10 times the result will be …
Multiple Choice
a subthreshold summation.
presynaptic inhibition.
threshold is reached and an AP is fired.
many APs are fired.
the membrane depolarizes.
Answers
When X fires 10 times and Y fires 10 times, the result will be a subthreshold summation.
Subthreshold summation happens when two or more presynaptic inputs that are sub-threshold (i.e., they cannot create an action potential) combine their effects on the postsynaptic neuron.
Here, the postsynaptic neuron has an RMP of -70mV and a typical threshold of -55mV. When neuron X is stimulated, it depolarizes by 0.5 mV.
When X and Y are stimulated simultaneously, the postsynaptic neuron depolarizes by 1 mV, which is sub-threshold (below -55mV).
Therefore, when X fires 10 times and Y fires 10 times, the postsynaptic neuron will experience subthreshold summation and no action potential will be fired.
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Which of the following is an acid?
NaOH
NaCl
HCI
CH4
Answers
Answer:
HCl
Explanation:
Some easy ways to identify if a compound is an acid is to locate an H+ proton, while basic compounds will have an OH- ion.
Examine all the choices:
A) NaOH
Already, we see that OH is here, so it's a base, not an acid. Eliminate.
B) NaCl
This doesn't have an H+ or an OH-, so it's not an acid. It's actually a salt. Eliminate.
C) HCl
This does have an H+, so it's an acid.
D) \(CH_4\)
Although this does have an H, it's a hydrocarbon - an organic compound. So, it's not an acid.
The answer is thus C.
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1. How does calcium ion concentration in blood affect muscle contraction? Does it lead to tetany in certain cases? How will you correlate fluctuation in blood calcium with tetany?
Answers
Calcium ion concentration in the blood affects muscle contraction because actin and myosin filaments return to their initial places as calcium ions leave the muscle cells, causing the muscle to relax.
The muscle relaxes as calcium ions leave the muscle cells, causing the actin and myosin filaments to return to their initial positions. In other words, a lower calcium level in muscles is indicated by a larger level of calcium ions in the blood. Muscle contraction will suffer as a result of this.
Muscle contraction results from the thin and thick filaments sliding apart from one another when Ca2+ is present in the cytosol. Similar to this, as the Ca2+ level drops, the binding sites are covered, causing contraction to cease.
Low calcium levels in bodily fluids due to impaired parathyroid gland function occur in cases of tetany. Periodic, excruciating muscle spasms (wild contractions) and trembling are symptoms of tetany.
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The diagram below represents some stages in the life cycle of humans. The numbers in the diagram represent various processes in the cycle.
Identify the process(es) represented by 1 and 2. State how these processes (1 and 2) affect the amount of genetic information provided by a parent to its offspring.
Answers
The process represented by 1 and 2 could be meiosis which is a type of cell division. The process represented by 3 could be fertilization which is the fusion of gametes to form a zygote.
The process of cell division called meiosis, that produces gametes with half the number of chromosomes as the parent cell is responsible for producing gametes. The genetic information provided by a parent to its offspring is determined by heredity and varies from one individual to another as do other genetically determined traits.
The life cycle of humans is divided into different stages. The sperm from the adult male human and the egg from the adult female human form a zygote inside the uterus. This zygote then undergoes mitosis to form an embryo. The embryo then develops into a fetus which is born after around nine months.
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Which process passes genetic material to offspring?
Answers
The Genetic inheritance occurs due to genetic material, in the form of DNA, being passed from parents to their offspring. When organisms reproduce, all the information for growth, survival, and reproduction for the next generation is found in the DNA passed down from the parent generation.
What factors may affect population growth ?
Answers
+ how many people migrate
+ birth/death rates
+ how much water there is
+ how much nutrients/minerals are available
+ how much trees/oxygen is available
Geothermal energy works best in regions where _____.
A.
hydrogen sulfide is produced
B.
magma is near Earth’s surface
C.
salts are abundant
D.
water is scarce
Answers
Answer:
B. magma is near Earth's surface
Explanation:
Answer: B: magma is near Earth's surface.
Explanation:
Geothermal energy is a type of energy that is generated by the heat of the Earth. It is harnessed through the use of geothermal power plants, which use steam produced from hot water and steam reservoirs found below the Earth's surface to generate electricity. Geothermal energy is most effective in areas where there is a high concentration of heat sources close to the surface, such as areas where magma is close to the Earth's surface. In these areas, the heat of the Earth can be more easily harnessed to produce steam, which can then be used to generate electricity.
One of the main advantages of geothermal energy is that it is a renewable and sustainable source of energy. It does not produce any greenhouse gases or air pollution, and it can be used to generate electricity around the clock, making it a reliable source of power. Geothermal energy is also relatively inexpensive to produce and can be used to heat and cool buildings, as well as to generate electricity. However, it is most effective in certain regions of the world where the conditions are suitable for harnessing geothermal energy, such as areas where magma is close to the surface.
g 1 molecule of glucose is catabolized to pyruvate and then acetyl-coA. All the acetyl-coA enters the citric acid cycle. How many molecules of NADH are produced from the citric acid cycle only (do not include NADH from glycolysis or the pyruvate dehydrogenase complex in your calculation.) You must answer as a number i.e if you think the answer is 12, you must enter 12, not twelve.
Answers
Answer:
6NADH
Explanation:
In the kreb's cycle NAD is reduced during the reduction of 6-carbon citrate to 5 carbon Alpha-Ketoglularate.
The second is produced during the conversion of 5carbon alpha ketoglutarate to succinate. Lastly in the conversion of fumirate to oxoloacetate;another NADH is formed.
However, since two pyruvate enters the Kreb's cycle therefore 6NADH(three NADH per cycle of Citric) are produced for each molecule of glucose that is broken down from glycolysis.
Remember,each glucose molecule goes through 2 cycles of Kreb.
Futhermore co-enzyme FADH2 are also produced,with 2 molecules per 1 glucose.
These Co-ezymes transfer hydrogen ions,into the matrix of the mitochondria,where is is splits to protons and electrons.
The electrons formed the ETC,which produce PMF for transporting protons into the intramembranes for electrochemical gradients needed to generate energy for ATP s synthesis,by ATP synthase.
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(PLEASE HELP!!!!)
When an action potential reaches a neuromuscular junction, which of the following will happen first?
Acetylcholine binds to acetylcholinesterase and depolarizes the cell.
Sodium ion gates and potassium ion gates open at the same time.
Acetylcholine enters into the synapse to bond with receptor proteins.
Synaptic vesicles receive a signal to release acetylcholine into the junction.
Answers
Answer:
Synaptic vesicles receive a signal to release acetylcholine into the junction.
Disclaimer: I am NOT one hundred percent sure, as I am doing the test right now. When I finish, I'll come back and confirm.
Update: I have finished the test, and this is the correct answer!
Answer: Synaptic vesicles receive a signal to release acetylcholine into the junction.
Explanation:
The bar chart here shows the relative speed of light through different types of media, air, water, and oil. Using the representation shown here, predict the speed of light through different media. Select ALL that correctly predict the light’s speed. A. Light traveling through glass would have a speed slower than that of light in air. B. Light traveling through a vacuum would have a speed higher than that of light in air. C. Light traveling through quartz would be faster than all speeds shown through the selected media. D. Light traveling through translucent plastic would be faster than all shown speeds through the media listed. E. Light traveling through humid air would be slower than the light through air but faster than light through water shown here.
Answers
Based on the information in the chart, light traveling through glass would have a speed slower than that of light in the air (option A), and light traveling through a vacuum would have a speed higher than that of light in the air (option B).
How does the speed of light change depending on the medium?Based on the graph, the denser the medium is the slower the light moves. For example, light is much faster when traveling in the air than when traveling in oil. Due to this, the true statements are:
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I need help! Pls help!!!
Answers
(iii) Enzymes P, Q and R (choose any one)
P - pepsin / protease
Q - amylase / carbohydrase
R - lipase / trypsin / protease / amylase
(c) There are many ways in which different types of enzymes are using in preparing baby foods such as the amylase breaks down the starch and the starch breaks down to maltose or glucose. The protease breaks down protein and the protein breaks down into amino acids. The lipase breaks down fats and then the fats break down to gylcerol.
Hope it's help you.If it is right
which of the following is most likely to occur when a barrier develops between two populations of the same species?
1. gene flow between the groups will increase due to more diversity between them
2. the species will become more distinct from each other
3. both groups will go extinct because there are not enough individuals to support them
4. individuals will develop adaptations that allow them to rejoin the other population
Answers
Answer:
The answer is 2
Explanation:
If the populations are separated from each other, they will start to be more diverse.
Which of the following layers in Earth have the highest density?
O outer core
O asthenosphere
O lithosphere
O lower mantle
Answers
a asthenosphere
Explanation:
It has the highest density
When the spine curves inward at the low back this is referred to as
Answers
Answer: Lordosis
Explanation:
|
A plane is a flat surface that has no ___ and extends forever.
Answers
Answer:
thickness
Explanation:
Planes have no thickness
Answer:
A plane is a flat surface that has no ending and extends forever.
Brown eye color is a dominant trait and blue eye color is a recessive trait.
What typically happens when someone inherits one allele for brown eyes and one for blue eyes?
O The person has brown eyes, and brown eye color remains a dominant trait.
O The person has blue eyes, but brown eye color remains a dominant trait.
O The person has brown eyes, but blue eye color becomes a dominant trait.
O The person has blue eyes, and blue eye color becomes a dominant trait.
Next
Submit
Save and Exit
Mark this and return
Answers
a. The person has brown eyes, and brown eye color remains a dominant trait.
since brown is dominant they only need one alle to have brown eyes. I hope this helps
A wound healing assay shows that expression of high GDI levels produces defects in cell migration. To assess actin organization in these cells, you perform immunofluorescence microscopy analysis with antibodies to actin and an appropriate secondary antibody. This experiment shows that actin organization at the leading edge of the cell is normal, but that there are significantly fewer stress fibers in the cell body and towards the trailing edge of the cell.
Which of following answer is most consistent with your observation?
A. GDI overexpression reduces the cytosolic concentration of G-actin ATP so that F-actin is rapidly depolymerized
B. GDI overexpression stimulates the activity of Rho, which then binds to the actin nucleation protein formin to nucleate linear actin filaments
C. GDI prevents a chemoattractant in the medium to bind to the receptor so that migration cannot occur
D. GDI sequesters the small GTPase Rho in the cytosol so that it cannot be activated by its GEF
E. GDI blocks the activation of Rac at the leading edge of the cell.
Answers
Option D. GDI sequesters the small GTPase Rho in the cytosol so that it cannot be activated by its GEF is most consistent with the given explanation of the wound healing process.
The wound healing test is a quick and inexpensive technique. This assay can be used to evaluate cell migration in a controlled in vitro environment, albeit it does not exactly replicate the circumstances of a wound. By making a hole in a confluent cell monolayer, the method imitates wounding. It comprises of four basic processes, which are covered in more detail below. Confluent cell monolayer culture serves as the test's initial step. This monolayer simulates the tissue's in vivo conditions just before injury, such as an intact epithelium. The monolayer is most typically formed by epithelial and endothelial cells, particularly cell types capable of sheet movement.
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14. What are five characteristics of organisms?
Answers
2. Reproduction
3. Energy processing
4. Homeostasis
5. Growth and development
WHAT IS THE PRIMARY DIFFERENCE BETWEEN WATER-AND-FAT SOLUBLE HORMONES IN TERMS OF WHERE THEY WORK?a.water-soluble hormones bind to outside cells, whereas fat-soluble hormones enter cells and act thereb.water-soluble hormones enter the cells and act there, whereas fat-soluble hormones bind to the outside of the cellsc.both hormones carry out their actions at the same place on the celld.all of the above are correcte.none of the above are correct
Answers
Water soluble hormones, such as glycoproteins or peptide hormones, cannot cross the lipidic membrane. The cell receptors for this hormones are located on the surface of the cell membrane. So, this hormones have their main activity on the cell surface.
Fat soluble hormones, for example steroids (cortisol, testosterone, estrogen), can easilly pass through the cell membrane, the receptors for these hormones are found within the cell, in the cytoplasm and the nucleus. These hormones act directly by estimulating the transcription of DNA to produce determined proteins.
The correct option is a.
In the third week of development of a human embryo, cells begin to develop unique structures and functions, such as muscle cells, nerve cells, and blood cells.
Which statement best explains how different cell structures can develop from the same cells?
-----------------------------------------------------------------------------------------------------------------------------
Development and differentiation result in the loss of some genes.
The embryo's cells create new genes depending on which structure it needs to form.
The cells have different genes depending on the embryo's stage of development.
The embryo's cells express different genes at different times for each structure.
Answers
Answer:
here u go
Explanation:
The embryo's cells express different genes at different times for each structure.
Genetic code is overlapping because the nitrogen bases are read continuously in groups of three nucleotide without sharing or overlapping.
True or false
Answers
Answer:
False
Explanation:
a genetic code will not overlap.
What are Bald eagle homologous structures
Answers
The wing of a bald eagle is homologous to the wing of a penguin. Homologous structures are structures that are of similar evolutionary origin.
How do we explain?Homologous structures are described as anatomical features found in different species that have a common evolutionary origin. These structures may have different functions in different organisms, but they share a similar underlying structure and can be traced back to a common ancestor.
The wing of a bald eagle and the wing of a penguin are considered homologous structures because they both evolved from a common ancestral structure, even though they serve different purposes which is flight in the case of the bald eagle and swimming in the case of the penguin.
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Which word describes a slope in biology?
Answers
Answer:
Concentration Gradient
Albinism (lack of pigment in man is caused by a recessive gene. If a heterozygous man
crosses with a heterozygous female. What is the chance that they will have an albino
child?
Answers
Why do Sea Spiders get so BIG? Give 2 Reasons:
I
Answers
An old alternative hypothesis for the evolution of infanticide was that parents killed offspring (including their own) when food was short for the good of the group. On the basis of a modern view of adaptation, why is this not a good explanation for the evolution of infanticide
Answers
Answer:
On the basis of gender preference.
Explanation:
In the modern view of adaptation, the main cause of infanticide is not the food but the gender preference. In many societies, people killed their infant when they knew that the infant is a girl. They thought that having a girl is curse or shameful thing so they kill the infant. These type of people wants male baby or prefer male child so that's why they kill the infants. In the ancient times, infants were killed that were abnormal or having any defects but today it happen due to gender preference.
Which statement about the members of a population that live long enough to reproduce is consistent with natural selection?
A.They transmit characteristics aquired by use and disuse to their offspring
B.They tend to produce fewer offspring than others in the population
C.They are the ones that are best adapted to survive in their environment
D.They will perpetuate unfavorable changes in the species.
Answers
Answer:
It's option B
Explanation:
Organisms which can't survive harsh times and have a small lifespan make huge amount of offsprings like ants. While long living animals make fewer offsprings like humans, whales, tortoises.
What is used to trap light energy in plants?
Answers
Answer:
chlorophyll
Explanation:
this is right
Answer:
Chlorophyll.
Explanation:
Chlorophyll, located in chloroplasts in the leaves of a plant.
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