The complimentary base of CAT is GTA. For transcription (RNA), Thymine will become Uracil. So, it will be CAU. I agree to Thomaster that it is histidine. Hope you understand.
Explanation:
The modern theory of chemical evolution is based on the assumption that on a primitive earth a mixture of simple chemicals assembled into more complex molecular systems, from which, eventually came the first functioning cell(s).
Answer:
b). activation of T cells
Explanation:
An APC (antigen-presenting cell) can be described as an immune cell, which detects, uptakes, and informs the acquired immune response when an infection takes place. B cells, macrophages, and dendritic cells are antigen-presenting cells.
These cells play an important role in activation of T cells. T cells are unable to recognize soluble or free antigens and can only recognize antigens processed and presented by carrier molecules, such as MHC molecules.
Presence of MHCII molecules is a defining feature of APCs that process and present antigens to T cells. Hence, all antigen-presenting cells help in activation of T cells.
Thus, the correct answer is option (b).
Yes, It is so strong enough that it can effect an Hillside.
Answer:
a) seedless (bryophytes) vs. seed condition (all others)
Explanation:
They produce enclosed gametangia( sexual) and sporangia(asexual), but they do not produce flowers or seeds. Reproduction proceeds through sexual and an asexual phase. They produce spores.
