Answer:
B) Viruses are killing some of his B cells and becoming incorporated into the genomes of others.
Explanation:
Epstein-Barr virus causes infectious mononucleosis by following mechanism.
1) Epstein-Barr virus attaches to and infects epithelium of the throat where it replicates and causes pharyngitis.
2) Virions enter the lymphoid vessels and are carried to the lymph nodes. Some virions escape the lymphnode trap and are carried to the bloodstream.
3) Virions attach specifically to B lymphocytes and infect them, producing either latent infection or productive infection.
4)The infected B lymphocytes actively replicate and differentiate into cells producing random immunoglobulins.
5)T cells respond to infection and destroy the lymphocytes replicating EBV vitus.
6) Latently infected B lymphocytes become immortal. They are not attacked by T cells.
A new cycle starts on the first day of her period, for 3-8 days. 14 days after the first day of the recent period, ovulation happens, & the lining builds up.
So basically, ovulation.
Hope that makes sense & helps. (:
Answer:
The correct answer is -
A) Fungal contraction to the oak tree
B) Less precipitation.
Explanation:
A biotic factor is the living thing present in an ecosystem and affects the system and leads to changes in the system. Here fungus is a living organism that influences the population size of the oak tree and the squirrels negatively.
An abiotic factor is a non-living thing condition or factor that affects the system and leads to the changes. In this case, the high temperature and the low rate of precipitation lead to changes in the size of the population.
It happens in the <span>chloroplasts</span>
