Answer:
In immunology, an antigen is a molecule or molecular structure, such as may be present on the outside of a pathogen, that can be bound by an antigen-specific antibody or B-cell antigen receptor. The presence of antigens in the body normally triggers an immune response.
DNA is tightly packed up to fit in the nucleus of every cell. ... Condensing DNA into chromosomes prevents DNA tangling and damage during cell division.
Answer:
The answer that you want to pick is
A-Oogenesis occurs in females, but spermatogenesis occurs in males.
Explanation:
Think about how babies are made you need a male and a female.
Answer:
Explanation:
1: it left rich black soil
2:The rosetta stone
3: not 100% on this one but i think it's they had planned grid-like streets
4:The began near the yellow and yangtze rivers
I did this last year. im pretty sure they are correct but am really sorry if they aren't. hope it helps
Answer:
sand is heterogeneous mixture
