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k0ka [10]
3 years ago
6

What role do maple trees play in a forest food web?

Biology
1 answer:
valentina_108 [34]3 years ago
6 0
Primary producer because they produce things that are nessacery
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A cell in the body is recognized as "self" by its _________ and is therefore not targeted by the immune response for destruction
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Answer:

C

Explanation:

The major histocompatibility complex (MHC) is a group of genes whose function is to codify proteins that participate in the immune response, helping the system to <u>recognize foreign substances to develop an immune response</u>.

<u>Histocompatibility or compatibility of tissue </u>is given by self-identifications molecules (antigens) located on the surface of cells, membrane, these molecules are almost <u>unique to each person</u>, letting the body to distinguish self from non-self.

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A fungal spore germinates, giving rise to a mycelium that grows outward into the soil surrounding the site where the spore origi
Alecsey [184]

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B) cytoplasmic streaming in hyphae

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The hyphae grow in the apical region which forms a branched structure in which the cytoplasm continuously moves between the hyphae at the point of fusion towards the growing tip. This movement of the cytoplasm towards the growing tip is known as "cytoplasmic streaming".

This streaming of cytoplasm is responsible for the formation of a zone of vacuolation and the mycelium is formed.

Thus, Option-B is the correct answer.

The growing tip eventually gives rise to a branch. This is the beginning of the branched mycelium. Growing tips that come in contact with neighbouring hyphae often fuse with them to form a hyphal net. In such a vigorously growing system, the cytoplasm is in constant motion, streaming toward the growing tips. Eventually, the older hyphae become highly vacuolated and may be stripped of most of their cytoplasm.

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