Tissues are grouped together in functional units called:

A) organs. B) cells. C) organisms. D) organelles.


Answer: A

Biology & Microbiology

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The mechanism of muscle contraction was first studied using

a. striated muscle examined using high-resolution light microscopy. b. smooth muscle examined using high-resolution light microscopy. c. striated muscle examined using high-resolution electron microscopy. d. smooth muscle examined using high-resolution electron microscopy. e. cardiac muscle examine using high-resolution electron microscopy

Biology & Microbiology

The first species of a community are __________. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

The carrying capacity of an environment is

determined by the a. net rate of reproduction of the female members of the population. b. population’s logistic growth. c. number of reproductively capable individuals in the population. d. population’s biotic potential. e. sustainable supply of resources it provides.

Biology & Microbiology

Cotyledons, or "seed leaves," absorb food molecules stored in the

A) megaspore. B) ovary wall. C) sporophyte. D) endosperm. E) gametophyte.

Biology & Microbiology