The best answer would be C. If freckles is dominant then we can eliminate answer choice D because that is recessive. We can eliminate answer choice A because that isn't even a genotype. We can eliminate answer choice B because the father doesn't have a dominant F only recessive f's. This means that the father cannot give a F, only f's.
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:
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Carbon dioxide removal (CDR)
Answer:
The correct answer is A. An ionic compound
Explanation:
Sodium (metal) and chlorine (nonmetal) form an ionic bond to each other, forming the NaCl (sodium chloride) molecule. Sodium transfers an electron to chlorine, which is missing an electron to complete the octet rule.
The lack of sunlight in deep oceans limit these types of organisms that can survive
