The human circulatory system can be described as which of the following?

a. a closed system
b. an open system
c. a somatic response
d. a voluntary process


a. a closed system

Biology & Microbiology

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Which of the following statements is

INCORRECT?

a. Viruses are not able to move by themselves. b. Viruses are not able to reproduce by themselves. c. Viruses are not structurally organized. d. Viruses are nonliving particles. e. Viruses contain instructions to manufacture themselves

Biology & Microbiology

Which colour are hummingbirds attracted to?

a. yellow b. blue c. red d. green

Biology & Microbiology

In prokaryotes, the term prokaryotic fission specifically refers to

A) the addition of a new plasma membrane between what will become two daughter cells. B) the growth phase of the cell cycle. C) asexual reproduction. D) the attachment of replicated DNA to the plasma membrane.

Biology & Microbiology

Enzymes that are secreted out of the cell to aid in the acquisition and digestion of environmental nutrients are called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology