Answer:
TCR
Explanation:
Helper T cells are the CD4T cells that are present in the inactive form. These cells have receptors for antigens on their surface. These antigen receptors are called T-cell receptors (TCRs). The function of TCR is to recognize and bind to specific foreign antigen fragments that are presented in antigen–MHC complexes. Different helper T cells have their unique TCRs to recognize a specific antigen–MHC complex. The CD4 proteins of helper T cells also interact with the MHC antigens and help maintain the TCR–MHC coupling.
 
        
             
        
        
        
A statement which best supports the choice made in Part A (independent assortment) is: C. The diagram shows four unique gametes that are the result of two chromosomes separating in different ways. 
<h3>
Mendel's law of independent assortment.</h3>
Mendel's law of independent assortment is a theory which states that the alleles of two or more different genes are sorted into unique gametes that are independent of each another. 
This ultimately implies that, the allele that is typically being received by a gamete for one gene doesn't influence or affect the type of allele that is received for another gene.
Based on the biological process (independent assortment) shown in the image attached below for part A, we can infer and logically deduce that a statement which best supports the choice made is that he diagram shows four unique gametes that are the result of two chromosomes separating in different ways. 
Read more on independent assortment here: brainly.com/question/2376592
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Pumps blood to the parts of the body and also it's-self
        
             
        
        
        
Vaccines will provide immune protection for Robin because immunization is one of the main ways to prevent disease. Through it, the body is protected from viruses and bacteria that seriously affect the human being, which can lead to death.
<h3>Why vaccinate?</h3>
After application of doses, the vaccine interacts directly with the patient's immune system, thus producing a response similar to that generated by natural infection. However, it does not cause illness or risk the life of the immunized patient due to possible complications of a naturally caused disease.
With this information, we can conclude that vaccines will provide immune protection for Robin because immunization is one of the main ways to prevent the disease. Through it, the body is protected from viruses and bacteria that seriously affect the human being, and can lead to death.
Learn more about vaccine in brainly.com/question/6683555