Chemotaxis is a process by which bacteria select one: a. respond to the presence of autoinducer molecules. b. move toward an attractant or away from a repellent. c. move on solid surfaces by means of type iv fimbriae. d. avoid phagocytosis.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing

Apond, rich in various micro-organisms, dries up due to drought. how will the amoeba in the pond protect themselves from this unfavorable condition?