White blood cells that engulf and destroy bacteria are called ________.

A) Phagocytes
B) Lymphocytes
C) Granulocytes


A) Phagocytes

Biology & Microbiology

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The function of the torus in the walls of tracheids is:

A. allowing the passage of water B. stopping backflow of water C. secretion of resin D. sealing off air bubbles E. allowing the escape of air

Biology & Microbiology

Based on composition similarities, actin can be divided into two major groups: the muscle-specific actins (________-actin) and nonmuscle actins (________- and ________-actin).

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

Biology & Microbiology

The only protists that have 2 types of nuclei in each cell are

a. Archaeplastida. b. Dinoflagellates. c. Ciliates. d. Excavates. e. Amoebozoans.

Biology & Microbiology

To be diagnosed as having hypertension, you consistently will have a diastolic pressure of ______ mm

Hg and a systolic pressure of _____ mm Hg. a. 120; 80 b. 80; 120 c. 90; 140 d. 140; 90 e. 120; 73

Biology & Microbiology