Answer:
CD4 on the surface of helper T-cells.
Explanation:
MHC class II ( major histocompatibility complex) molecules are processed from the exogenous source. The presentation of antigen on cells are important for the adaptive immune response.
MHC class II interact with CD 4 present on the surface of T helper cells. This interaction is important for the generation of an immune response. Helper T cells can release cytokines and can perform phagocytosis.
Thus, the correct answer is option (C).
Answer: option "A" One seed develops from each ovule.
Explanation:
Ovules are the female reproductive part of the plant which is internally covered by the nucellus and integuments further helped in fertilization and development of seed.
After fertilization, ovule is the part of the plant develops into seed, after a period of time food tissue is developed inside it consisting the seed coats called integuments.
pollen grains or sperms are being transferred through the pollen tube to the embryo sacs from integuments only, which results into the fertilization and development of seed.
Answer : Yellow
Explanation : Because purebred plants have lighter colored dominence .
Carbohydrates, Lipids, Proteins and Nucleic Acids
