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viktelen [127]
3 years ago
15

Correctly order the steps involved cellular immunity:

Biology
1 answer:
REY [17]3 years ago
5 0

Answer: B

Explanation:

The T helper cell needs to acttivate the T cyctotoxic cell in order for the Tc cell to go do its work.

Once the TC cell is active it interacts with MHC-1 proteins on the surface of the infected host cell, this allows the Tc cell to recignise the host cell and begin secreting cytotoxins (perforins and granzymes) in order to degrade the infected cell and cause apoptosis (controlled cell death)

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2 years ago
A researcher claims that the Makira Island and the Santa Ana Island flycatchers are diverging into different species. Identify T
natali 33 [55]

Answer:

Prezygotic barriers:

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Explanation:

Pre-zygotic barriers are the barriers which do not allow the formation of the zygote in the organisms.

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8 0
3 years ago
identify the part of the female reproductive system by lebeling the diagram.
trapecia [35]

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Explanation:

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