Answer:
Letter c
Explanation:
tissues and organs
The production of mutations
Answer:
Matution include changes as small as the substitution of a single DNA building block, nucleotide base, with another nucleotide base.... Other matutions result in abnormal protein product.
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
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.
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.
A patient is being treated with carbonic anhydrase (CA) inhibitor. Which of the ions will be affected and what will be the effects on urine/plasma pH and urine volume?
Answer:
bicarbonate ions; urine alkalinization; carbonic anhydrase inhibitors increase urine volume (diuretics drugs)
Explanation:
Carbonic anhydrase inhibitors are diuretic drugs that have been primarily used to treat glaucoma, a condition where the optic nerve is progressively damaged due to an increased pressure in the eye. Carbonic anhydrase inhibitors reduce the production of aqueous humor in the eyes by decreasing bicarbonate (HCO3-) production, thereby also reducing the intraocular pressure, which is useful to treat glaucoma. Diuretics are drugs that are able to increase the volume of urine by stimulating the excretion of salts and water from the kidneys. In the kidneys, carbonic anhydrase inhibitors inhibit HCO3- uptake by the proximal tubule, leading to urine alkalinization.
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
based on the map shown above which statement is most accurate
a. Solar energy is most available in the southeastern part of the united states
b. solar energy is most available in the northwestern part of the united states
c. solar energy is most available in the southwestern part of thw united states
d. solar energy is evenly available all over the united states.
Answer: C. solar energy is most available in the southwestern part of thw united states
Explanation: Please mark brainliest if correct - I need one more to get to the next level thanks
please answer this too:)) :((
Answer:
Northern Hemisphere
The Northern Hemisphere receives the direct sun rays while the angle of sunlight decreases in the Southern Hemisphere.
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:
the author of the story the yellow wallpaper
Are there any combinations that give rise to both black and white-fur offspring?
Answer:
Two samezygous black(FF)
Olive oil, butter, and margarine all contain:
a. carbohydrates
b. lipids
c. nucleic acids
d. proteins
The haploid cells join during sexual reproduction are called _______?
a) stamens
b) spindles
c) pistils
d) gametes
Answer:
Gametes
Explanation:
Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome.
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.
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
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.
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.
In which environment would wind erosion be most
pronounced?
Select one:
a. Rain forest
b. Mountain range
c. Desert
Answer:C Sa Mạc
Explanation:
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!
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.
what is vertebrate??
Answer:
Vertebrates are animals that have a backbone inside their body
Explanation:
Answer:
Vertebrates are organisms that have a backbone.
Explanation:
I hope this helps.
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 is a gene? Can someone tell me what is Euchromatin? Is Euchromatin also called a Gene? What's the difference between these two?
Answer:
In biology, a gene is a basic unit of heredity and a sequence of nucleotides in DNA or RNA that encodes the synthesis of a gene product, either RNA or protein. During gene expression, the DNA is first copied into RNA.
Euchromatin is a lightly packed form of chromatin that is enriched in genes, and is often under active transcription. Euchromatin comprises the most active portion of the genome within the cell nucleus. 92% of the human genome is euchromatic.
The genes present in heterochromatin are usually inactive. The genes present in euchromatin are either already active or will be active during growth. Heterochromatin is transcriptionally-inactive. Euchromatin is transcriptionally. (This one here is the difference)
The ____ in an experiment is the factor that
responds to what is being changed/tested. It is
the measured, or observed, data.
-dependent variable
-independent variable
-control group
-constant
Answer:
Constant is the answer. Maybe it us dependent or Independent.
si tienes caspa y te cortas el cabello asta hacerte pelado, se te va la caspa ?
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
what is different between economic activities non economic activities
Answer:
The main difference between economic and non-economic activities lies in the fact that economic activities are carried out to fulfill human needs, whereas non-economic activities are carried out for psychological satisfaction.
Explanation:
semoga bermanfaat:)
eager to learn!! ^_^
Cells in the leaves of plants contain specialized structures called
chloroplasts. How are chloroplasts related to the function of the leaf cells?
A. Chloroplasts absorb substances from the soil.
B. Chloroplasts transport water and nutrients through the plant.
C. Photosynthesis occurs in chloroplasts.
D. Plant reproduction occurs in chloroplasts.
SUBMIT
Answer:
C
Explanation:
Photosynthesis occurs in chloroplasts
Answer: The answer is C
Explanation: Photosynthesis occurs in the chloroplasts
because in the chloroplast the chlorophyll presents allow the energy in sunlight to drive chemical reactions. Chloroplasts act as energy transducers converting light energy into chemical energy.
HOPE THIS HELPS!!!
which pair of atom an ionic bond
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
