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Makovka662 [10]
3 years ago
6

Law of superposition in horizontal layers of sedimentary rock

Biology
1 answer:
Tomtit [17]3 years ago
4 0

Answer:

I believe the correct answer is A. Younger than the layer above it, and older than the layer below it.

Explanation:

That beds of rock on top are usually younger than those deposited below.

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Positive selection tests to see if the ______ of a T-lymphocyte can recognize and bind to an MHC molecule.
DENIUS [597]

Positive selection tests to see if the TCR of a T-lymphocyte can recognize and bind to an MHC molecule.

<h3>What is a T-lymphocyte?</h3>

A T-lymphocyte is a special type of immune cell that is generated inside the bone marrow.

The T-cell receptor (abbreviated as TCR) is a protein located on these immune T lymphocytes.

In conclusion, Positive selection identifies if the TCR of a T-lymphocyte can recognize and bind to an MHC molecule.

Learn more about T-lymphocytes here:

brainly.com/question/17025187

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