Remember that a biotic factor is a living component in an ecosystem that affects the population of another organism. So that means that the answer is B.
Answer:
Number 3
Explanation:
Number 3 or C is correct, "action of white blood cells when certain bacteria enter the body." This is the correct answer because white blood cells are in your body to fight off infections. some peoples immune system see these bacteria on the peanut, egg, or milk as an enemy so it tries to fight against it even though it is harmless to the body.
Having the haploid number of chromosomes allows the zygote to have the correct number. If gametes weren't haploid, every generation of organisms would have twice as many chromosomes as their parents. I hope my answer has come to your help. God bless and have a nice day ahead!
Frequent use of pesticides
Drug use (especially alcohol, tobacco, and marijuana) ...
Early sexual intercourse and without protective measures. ...
Eating disorders. ...
Antisocial behavior. ...
Dropout of studies.
