Answer:
Each B cell produces a single species of antibody, each with a unique antigen-binding site
Explanation:
Should be Eukarya, I think
Answer: Spermatogenesis begins at birth and continues throughout a man's life.
The process in which
haploid spermatozoa develop from germ cells in the seminiferous tubules of the
testis is known as Spermatogenesis. Thus, the process of spermatogenesis start
with mitotic division of the stem cells that is located close to the basement
membrane of the tubules. However, a mature male gametes known as sperm but it
is commonly known as spermatozoa.
(C) earth's outer iron core
this is because iron is magnetic and therefore forms a strong magnetic field
