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frozen [14]
3 years ago
15

A farmer practices ____ when he prepares new farmland to replace fields in which soil has been exhausted.

Biology
1 answer:
zlopas [31]3 years ago
4 0
The answer to your question would be (<span>barter)</span>
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Explain the importance of immunological memory cells. Describe in detail how and when memory cells arise and explain how they fo
Vlad1618 [11]

Explanation:

<em>Immunological memory</em> is the property of the immune system to store information about a stimulus so it can mount an effective response if it encounters the same stimulus again being this second response quicker and stronger even after years since the first encounter.

This kind of response is dependent on many subpopulations within T and B lymphocytes and NK cells. When encountering an antigen, B cells recognize it by membrane antibody specifically binding to the antigen and then being activated to expand rapidly with their progeny clones differentiating into plasma and memory B cells, these last ones have a long life span to remain in the body, ready when another encounter with the same stimulus occurs, this is how the basis for effective immunizations happens.

I hope you find this information useful! Good luck!

4 0
3 years ago
Minerals will form from a solution when the liquid from the solution evaporates. true or false
nalin [4]
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4 0
2 years ago
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If a cell culture contains 400 cells/ml at time = 0 and it has a generation time of 30 minutes, how many cells (cells/ml) will b
Semmy [17]

Answer:

The answer to your question is: after two hours there will be 6400 cell/ ml

Explanation:

Data

Bacteria t = 0; 400 cells/ml

generation time = 30 minutes

# cells after two hours = ?

                                 # of bacteria               time

                                     400                            0

                                      800                         30 min

                                   1600                           60 min

                                   3200                           90 min

                                   6400                          120 min

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3 years ago
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In what organelle do the kreb’s cycle and the electron transport chain take place?.
marysya [2.9K]

Answer:

<em>Kreb cycle occurs in mitochondrial matrix and electron transport system occurs in the inner membrane of mitochondria.</em>

5 0
1 year ago
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