PLEASE HELP ME ASAP BECAUSE IT IS DIFFICULT TO UNDERSTAND. Explain it for me.

C.

Explanation:

For mRNA strands, there are four letters used in their code. A (adenine), U (Uracil), G (guanine), and C (cytosine.)

For RNA, it is the same, but the Uracil is replaced with Thymine (T).

A always pairs with U.

G always pairs with C.

YOUR QUESTION:

The scientist's strand code is has to convert the Thymine to Uracil since it is RNA instead of mRNA.

Hopefully this somewhat helped :)

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.