Answer:
Option. A) 12
Explanation:
An organism with 24 chromosomes in each body cell will produce sex cells with 12 chromosomes. The chromosome number is half because meiosis occurs in sex cells in which parent cell is divided into four daughter cells having half number of chromosome i. e. haploid. So the parent cell has 24 chromosome when division occurs, the number of chromosome becomes half i. e. 12.
Silica is a major mineral in sand.
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Answer:
In a primary immune response, naive B cells are stimulated by antigen, become activated, and differentiate into antibody-secreting cells that produce antibodies specific for the eliciting antigen.
A secondary immune response is elicited when the same antigen stimulates memory B cells, leading to the production of greater quantities of specific antibodies that are produced in the primary response
Answer:
These genes have Dorsal-binding sites of varying affinity.