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Novosadov [1.4K]
3 years ago
15

2. Why is sand not as useful as soil as evidence?

Biology
1 answer:
Angelina_Jolie [31]3 years ago
5 0

Answer:

Glass and sand are composed predominantly of silicon.

Explanation:

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Memory cells may take the form of B cells. T cytotoxic cells. T helper cells. All of the choices are correct.
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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.

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A client appears very anxious, with 40 shallow respirations per minute. the client complains of feeling dizzy and lightheaded an
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The  client  who   complain  of  felling   dizzy  and  light    headed  and  having   tingling  sensation  of    fingertips  around  the  lip   is  related  to    hyperventilation.

 
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The stomach helps to digest food with<br> processes.
anyanavicka [17]

Answer:

Chemical and Physical Processes

Explanation:

I've watched Magic School Bus. pls mark brainliest

8 0
4 years ago
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motikmotik

Answer:

C: the song bird

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