B, as the helper T cells need to recognise the antigens to know what they need to attack, and they activate cytotoxic T cells to destroy infected body cells.
Answer:
It is a route in which N2 in the atmosphere is converted into ammonia by prokaryotes using an enzyme complex (Nitrogenase), and an N pool is maintained in the ecosystems, which replenishes N losses. BNF occurs naturally in the soil by N fixing bacteria (Rhizobium and legumes/Azotobacter)
Answer:
The prey with unfavorable characteristics will survive and pass traits to future generations
Answer:
It does
Explanation:
Dominant traits show over non dominant traits
Answer:
The answer to your question is D, Sugar
