Answer:
450 years all in all but it'd take about 1000 years in a landfill
Explanation:
Effector B cells clear the resolution of infections/and the rest persist as the memory cells that Normally survive for years.
Answer:
Crossing Over. Crossing over, or recombination, is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
