Answer:b-cells produce antibodies or (memory b-cells)
Explanation:B cells are one of the two types of lymphocytes, the other kind being T cells. B-cells have a very specific function: the production of antibodies, which play a major role in immunity. Memory cells remember specific foreign invaders, pathogens, and antigens to fight them off if they come back in the future.
The value of Q is 0.44 if 20 organisms of 100 organisms are green.
Explanation:
Data given:
alleles for the color of eyes of fly:
blue allele = dominant represented by P
green allele = recessive, represented by Q
total number of organism = 100
number of recessive trait organism,
= 20
Q =?
The allele frequency of the green eye is calculated as:

= 
= 0.2
q = 
q = 0.44
0.44 is the frequency of Q allele in the population.
Q is the homozygous recessive alleles in the population and its value is 0.44.
Despite these similarities, prokaryotes and eukaryotes differ in a number of important ways. A prokaryote is a simple, single-celled organism that lacks a nucleus and membrane-bound organelles.
Answer:
I believe the answer is B. Questions about the value of scientific knowledge
Explanation:
Because we are still learning new things and a piece of scientific knowledge that is not so useful now could end up being way more useful for something we have not discovered yet.