What is a population?

A) a group of organisms living in a particular geographic area
B) a group of organisms of the same species living in a particular geographic area
C) a community as well as all the abiotic factors in a particular geographic area
D) all of the organisms of a species existing at a particular time


B

Biology & Microbiology

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Four of the five choices listed below are

characteristic of sclerenchyma cells. Select the exception. a. sclereid b. found in seed coats c. retain the ability to divide after differentiation d. gritty texture of pear cells e. used in manufacture of paper, textiles, and rope

Biology & Microbiology

Which statement best describes the mechanism of neutralization?

A) Antigens clump together and are more susceptible to phagocytosis. B) Cells are neutralized by toxins injected by natural killer cells. C) It causes pathogenic cells to lyse. D) An antibody blocks an antigen's activity by binding to it. E) Pathogens are bound by antibodies and are more susceptible to phagocytosis

Biology & Microbiology

Tumors cannot grow beyond a certain size or spread without a blood supply

a. true b. false

Biology & Microbiology

Ethylene oxide is

A. a halogen. B. sporicidal. C. used as an antiseptic against anaerobes. D. the active agent in household bleach. E. only effective with high heat.

Biology & Microbiology