Answer:
B it think
were did you get this question?
Why do you think sea otters are important in the kelp forest?
Answer:
It controls the population of sea urchins.
Explanation:
Sea otters are very important in maintaining the balance of ecosystems present near the sea or ocean, such as kelp forests etc. In the absence of sea otters, sea urchins can increase in population i.e. overpopulate the sea floor and feed all vegetation of the kelp forests that provide cover and food for many other marine animals which leads to imbalance of an ecosystem so that's why we can say that sea otters are important in the kelp forest.
Which of these provides evidence from development biology of a shared evolutionary history ?
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the leg of the whale and the skeletal structure of it provides the evidence from developmental biology of a shared evolutionary history.
Answer:
D. The skeletal structures of a leg of a horse and a flipper of a whale are very similar.
Explanation:
Wrong answers will be deleted and reported.
Plz, help! Mild fever, chills, headache, and swollen glands are symptoms of:
1.)rubella
2.)influenza
3.)measles
4.)mumps
thank you for your help!
4.) mumps or Mononucleosis
Answer:
4 ) mumps or Mononucleosis
Explanation:
(Will mark brainliest)
As you know, coronaviruses, influenza viruses, measles viruses, and rhinoviruses all encode RNA-
dependent RNA polymerases. All four of them introduce this gene into host cells. Two of them
ALSO introduce the RdRp enzyme. Which two? Why MUST they carry the polymerase protein in the
virus particle?
Answer:
In order to form more DNA molecules.
Explanation:
These viruses carry the polymerase protein in the virus particle because this protein synthesizes DNA molecules from deoxyribonucleotides. This formation of DNA molecule enables the virus cell to increase in their population. Each and every new cell of virus requires DNA molecules so we can say that this polymerase protein is very important and necessary for virus.
Which of the following best describes bacteriophage?
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A.A bacterium that obtains energy by feeding on other bacteria
B.A virus that infects bacteria
C.A virus that passes eukaryotic genes to prokaryotes
D.A bacterium that takes in free DNA from its environment
Answer:
b. A virus that infects bacteria.
Part A - Calculating allele frequencies in a population The first step in testing whether a population is in Hardy-Weinberg equilibrium is to calculate the allele frequencies in the population. Remember that the frequency of an allele in a gene pool is the number of copies of that allele divided by the total number of copies of all alleles at that locus. Using the day 7 data, what is the frequency of the CG allele (p)
Answer:
the frequency of the CG allele (p) is 0.476 ≅ 0.48
Explanation:
Due to technical problems, you will find the complete explanation in the attached files.
A heterozygous tall (Tt) plant is crossed at with a short plant (tt). The probability that offspring plants will be tall is
a. 25%
b. 50%
c. 75%
d. 100%
The answer is 50%, or B.
What happens to the body when motor neurons are injured?
ANSWER:
Lesions are areas of damage to motor neurons. Damage to upper motor neurons stops the signals your muscles need to move. When your muscles don't move for a long time, they become weak and stiff. Over time, it can become harder to walk and control your movement.
Explanation:
I hope it will help you
IN YOUR OWN WORDS, what is the definition for Turner's Syndrome
Explanation:
Turner's syndrome is condition that apparently affects only female, results when one of the X chromosomes (sex chromosomes) is missing.
Hope this helps you!
Which of the following is an example of an anabolic reaction?
A
citric acid cycle
B
fatty acid decarboxylation
C
glycolysis
D
photosynthesis
si tienes caspa y te cortas el cabello asta hacerte pelado, se te va la caspa ?
Describe the production of an Action Potential in a post-synaptic neuron and its production of an AP in a neuron. Compare the propagation of these AP's (from the trigger zone to the axon terminal) in myelinated and unmyelinated axon.
Answer and Explanation:
The function of neurons is to transmit nerve impulses. The transmission depends on the unequal distribution of ions in the interior and the exterior of the cell.
The cell interior has many negative ions –anions- and k+ ions that cannot get out of the cell, while the extracellular space has many Na+ and Cl- ions.
The charge difference between the interior and the cell exterior is named resting potential difference, representing a non-exited state.
When the neuron is stimulated, many changes in channel proteins occur that let the ions move through the membrane altering the resting-potential difference.
The central nervous system generates an action potential that travels to the target activating the calcium channels. Calcium triggers vesicles fusion to the presynaptic membrane releasing a neurotransmitter into the synaptic space. Once there, the molecule binds to its receptors on the postsynaptic membrane, causing ion channels to open. The activation of different receptors will cause a change in the postsynaptic membrane modifying the cell activity.
Two types of receptors can be found the in te postsynaptic membrane:
Ion channel receptors -or ionotropic- that produce a fast change in the membrane potential when opening. But when the neurotransmitter disappears, the response does it too. Metabotropic receptors that trigger a slow change in the membrane potential. They produce a slower response, but it lasts longer.Depending on the ion flow through the membrane channel receptors, the postsynaptic potential may be depolarizing - excitatory postsynaptic potential, EPP-, or hyperpolarizing - inhibitory postsynaptic potential, IPP-. For instance, the entrance of Na+ ion depolarizes de cell. But if K+ gets out of the cell, it produces hyperpolarization.
Depolarizations or hyperpolarizations can be taken to other regions of the cell. The depolarizing or hyperpolarizing effect will gradually fade as it increases the distance from the potential change origin.
Under physiological conditions, when the axon is stimulated occurs a depolarization. If the stimulus exceeds a threshold level, many sodium gates open simultaneously, and the action potential occurs, responsible for the nerve impulse transmission. Once Na+ channels get closed, K+ channels open. Ions traffic consists of the pass of sodium to the interior of the cell and potassium to the exterior. K+ follows a concentration gradient, while Na+ follows an electrochemical gradient.
When the electrical stimulus is applied to the membrane of the axon it produces depolarization by activating the sodium voltage-dependent channels all along the axon. Depolarization propagates to inactivated regions adjacent to the membrane opening more sodium channels.
There is a directly proportional relationship between the fiber diameter and the conduction velocity. The greater the diameter is, the faster the conduction is. Most axons contain a myelin sheath formed by the envelopment of the axon by glial cells. Myelin is fatty and isolates the axon, so in myelinic regions, there is no ion exchange. So to conduct the impulse, there must be regions without myelin. These regions are the Ranvier nodes, which have channels for ion interchange.
The conduction speed increases in myelinated fibers because of the high concentrations of sodium channels in the Ranvier nodes. Mielinized fibers are thick, and their conduction velocities are very fast.
What renal actions does angiotensin II have that are not related to its ability to produce vasoconstriction
Answer:
Angiotensin II is a main effector of RAS and is produced due to the release of the renin that forms in the kidney, angiotensin in turn stimulates the release of aldosterone from the adrenal cortex.
Angiotensin II serves various roles other than vasoconstriction to maintain blood pressure that are:
1. Autoregulation of GFR
2. Reduction of salt excretion through direct and indirect actions on renal tubular cells,
3. Growth modulation of renal cells - these express AT1 receptors.
Plz answer my question i asked before this (plz, i will give brainliest to u if answered correctly)
Answer:
is that the one i answered already...
Explanation:
A cactus can either have long needles (L) or short needles (). A cactus
grower crosses two cacti. The cross is shown in the Punnett square below.
What is the phenotype ratio for this cross?
A. Four long, zero short
B. One long, three short
C. Two long, two short
D. Three long, one short
Answer:
D.
PLEASE FOLLOW ME
OPTION D will right
which pair of atom an ionic bond
the author of the story the yellow wallpaper
Allosteric effectors: Question 1 options: can lead to a decrease in the availability of a protien alter enzyme activity by binding to the active site of an enzyme can cause large changes in enzymatic activity decrease the sensitivity of the enzyme at nearly all concentrations of substrate do not alter the sensitivity of a metabolic pathway
Answer:
can cause large changes in enzymatic activity
Explanation:
An enzyme refers to a biological catalyst that is typically used to speed up (accelerate) the rate of a chemical reaction by lowering the activation energy of its reactants.
An allosteric effector can be defined as an agent, organ or molecule that is being binded to an enzyme at a site, thereby causing a reduction (negative effect) or an increase (positive effect) in an enzyme activity.
When the activation energy of a reaction is low, the rate of the reaction would be faster. Therefore, an enzyme speeds or catalyzes the rate of a reaction by lowering its activation energy.
Additionally, if the conditions are not optimal for an enzyme, it limits the ability of an enzyme to bind or be joined with its substrates.
Furthermore, an increase in temperature increases or speeds up the rate of a reaction while low temperature limits or reduces the rate of a reaction.
In the human body, the optimal temperature for enzymes is around 37 degrees celsius (°C).
In conclusion, an allosteric effector can cause large changes in enzymatic activity because it acts as an intermediary and mediates specific effect in a metabolic pathway.
The transfer of heat by the movement of matter, such as the flow between the warm and cool parts of a
liquid, is an example of:
O A. Radiation
B. Conduction
OC. Induction
D. Convection
Are there any combinations that give rise to both black and white-fur offspring?
Answer:
Two samezygous black(FF)
which of the following represents ways nitrogen can enter the soil?
I. Photosynthesis
II. Sunlight
III. Rainfall
III only
I and II
I and III
I, II and III
PLEASE HELP
Answer: Your answer is C
Explanation:
can anyone answer this
Answer:
1. nucleus
2. chloroplast
3. ATP
4.Endoplasmic Reticulum
Explanation:
HOPE THIS HELPS U
PLS MARK BRAINLIEST
Chang wants to build a circuit that will light up a bulb from a flashlight, and has a battery, switch, wire, and a light bulb.
Which component would Chang use as the source of energy?
the battery
the switch
the wire
the light bulb
The battery component would Chang use as the source of energy.
What is Battery?Batteries consist of one or more cells, each of which undergoes chemical processes to produce an electron flow in a circuit.
Each battery has three primary components: an anode (the "-" side), a cathode (the "+" side), and an electrolyte of some sort.
When the cathode and anode of a battery are connected to a circuit, a chemical reaction takes place between the anode and the electrolyte. Following this reaction, electrons return to the cathode and experience a second chemical change.
Therefore, The battery component would Chang use as the source of energy.
To learn more about Battery, refer to the link:
https://brainly.com/question/11670669
#SPJ7
Which process form glaciers.
Answer:
Glaciers form in places where more snow falls than melts or sublimates. As the layers of snow pile up, the weight on the underlying snow increases. Eventually, this weight packs the snow so tightly that glacial ice is formed.Answer:
d. accumulation and compaction
Explanation: edge
what produce energy from food during respiration
Answer:
The cellular process of releasing energy from food through a series of enzyme-controlled reactions is called respiration. Some of the energy released is used to produce ATP. Some of the energy released is lost as heat.
ls Carbon dioxide needed for photosynthesis
Yes.
6CO2 + 6H2O → C6H12O6 + 6O2
As you saw in Part C, the body sizes of sympatric and allopatric P. cinereus and P. hoffmani are consistent with a hypothesis of character displacement resulting from interspecific competition. What additional information would strengthen the argument that character displacement is in fact responsible for body size evolution in these salamanders
Answer:
Divergence in the body size trait between both species occurred once they were living together. The evolution of the trait difference occurred after sympatry.
Explanation:
Close species, P. cinereus and P. hoffmani, mostly live in different regions. In allopatry, both species have the same -or very similar- body size. Body size in these species is a heritable trait.
However, there are some areas where P. cinereus and P. hoffmani coexist. When they are in sympatry, P. cinereus exhibits a smaller body size and feeds on smaller prey items than allopatric P. cinereus. On the other hand, sympatric P. hoffmani exhibit bigger bodies, feeding on bigger prey items than the allopatric P. hoffmani.
So, when both species are in sympatry, they develop different morphological traits to avoid competition between them and manage to coexist in the same area. Resource availability is limited, so P. cinereus became smaller and feeds on small prey, while P. hoffmani became bigger and feeds on bigger prey. Through this trait divergence, they got to live longer and reproduce more, decreasing interspecific competition and increasing their fitness.
Allopatric species feed on similar prey items and have similar body sizes, reflecting that the divergence occurred after sympatry. If species living in allopatry were places together in the same habitat, they would exhibit strong competition that, over time, would drive to character displacement.
How are all fungi and all protists alike?
Explanation:
Since plants and fungi are both derived from protists, they share similar cell structures. Unlike animal cells, both plant and fungal cells are enclosed by a cell wall. As eukaryotes, both fungi and plants have membrane-bound nuclei, which contain DNA condensed with the help of histone proteins.
Which of the following is a type of heat transfer?
O A. Coriolis
B. Conduction
OC. Transference
OD. Induction
Answer:
option B
b
b
b
b
b
b
B
b
b
b
b
b
b
b
b
Help!! please just a bit confused
Answer:
phospholipids are composed of a phosphate group, two alcohols, and one or two fatty acids. On one end of the molecule are the phosphate group and one alcohol; this end is polar, i.e., has an electric charge, and is attracted to water (hydrophilic).
