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olchik [2.2K]
3 years ago
5

Why would a rough, steep mountain habitat have a higher rate of speciation

Biology
1 answer:
Effectus [21]3 years ago
8 0

Answer:

I think the correct answer is A

Explanation:

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Which two cellular organelles in eukaryotes have both electron transport systems and chemiosmotic mechanisms?
aalyn [17]

Answer:

Mitochondria and the chloroplast

Explanation:

Electron transport refers to the transfer of of electrons from electron donors to electron acceptors via a reduction-oxidation reaction.  

In the mitochondria the process is called Oxidative phosphorylation whereas in the Chloroplast it is called Photo-phosphorylation since it utilizes light.

Chemiosmotic mechanisms allow the movement of ions across a semi-permeable membrane down their electrochemical gradient.

In both mitochondria and chloroplast,have these mechanisms for the production of ATP .

7 0
3 years ago
Tetrodotoxin, also known as "zombie powder" is synthesized by the puffer fish as a defense mechanism. Tetrodotoxin's mechanism o
torisob [31]

Answer:

True

Explanation:

Tetrodotoxin is the molecules that act as a poison to the organism in which they are injected.

The tetrodotoxin proves lethal to the organisms as it kills the organism by interfering with the nervous system. The tetrodotoxin blocks the sodium channels in the neuron as a result of which the sodium is unable to enter the neurons and hence the electrical impulse is not generated.

If the tetrodotoxin blocks the motor neuron transmission by blocking the sodium channels then the signals will not reach the muscle and muscle will not be able to contract.

Thus, true is correct.

6 0
3 years ago
What do you need to do to find the mass of a liquid? What do you need to do to find the mass of a liquid? (2 points)
galina1969 [7]

<em><u>ANSWER</u></em>

ln most cases inorder to obtain the mass of a liquid one measures the mass of both the liquid and the container it is in and after wards remeasures the container alone and later subtract the mass of the container alone from the total mass of both the container and the liquid

4 0
3 years ago
Memory cells may take the form of B cells. T cytotoxic cells. T helper cells. All of the choices are correct.
topjm [15]

Answer:

Having considered how an appropriate primary immune response is mounted to pathogens in both the peripheral lymphoid system and the mucosa-associated lymphoid tissues, we now turn to immunological memory, which is a feature of both compartments. Perhaps the most important consequence of an adaptive immune response is the establishment of a state of immunological memory. Immunological memory is the ability of the immune system to respond more rapidly and effectively to pathogens that have been encountered previously, and reflects the preexistence of a clonally expanded population of antigen-specific lymphocytes. Memory responses, which are called secondary, tertiary, and so on, depending on the number of exposures to antigen, also differ qualitatively from primary responses. This is particularly clear in the case of the antibody response, where the characteristics of antibodies produced in secondary and subsequent responses are distinct from those produced in the primary response to the same antigen. Memory T-cell responses have been harder to study, but can also be distinguished from the responses of naive or effector T cells. The principal focus of this section will be the altered character of memory responses, although we will also discuss emerging explanations of how immunological memory persists after exposure to antigen. A long-standing debate about whether specific memory is maintained by distinct populations of long-lived memory cells that can persist without residual antigen, or by lymphocytes that are under perpetual stimulation by residual antigen, appears to have been settled in favor of the former hypothesis.

6 0
2 years ago
Darla was in an automobile accident that resulted in an injury to her brain. Her sense of touch has been affected. Which part of
Aleksandr-060686 [28]

Answer:

SENSORY CORTEX

Explanation:

The sensory cortex is the part of the brain that works on information referring to touch (called somatosensation) and other sense of feelings.

More specifically, the somatosensory cortex has a responsibility of processing touches in our body

7 0
3 years ago
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