An endemic disease is constantly present, usually at low incidence, in a population
Indicate whether the statement is true or false.
Answer: TRUE
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Chemokines are a group of small proteins that
A) attract T cells to sites of injury. B) function as chemoattractants for phagocytes and lymphocytes. C) potentiate specific immune responses. D) attract T cells, phagocytes, and lymphocytes, as well as potentiate specific immune responses.
The results that demonstrated that traits were not blended were the ones where
A. The F2 plants were selfed B. The true-breeding parents were crossed C. The F1 generation plants were selfed D. None of these experiments refuted the blending hypothesis
The primary function of an enzyme or any biological catalyst is to
A. reduce the energy of activation of a reaction. B. increase the rate of a reaction. C. increase the rate of a reaction and change the direction of a reaction. D. reduce the energy of activation and increase the rate of a reaction. E. change the direction of a reaction.
The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called
A) mitosis. B) cytokinesis. C) binary fission. D) telophase.