A white blood cell (WBC) encounters bacteria in a scrape on the knee of a child who has fallen off of his bicycle. The WBC's job is to take the bacteria inside of itself and destroy the bacteria. If the bacteria cannot be moved across the WBC membrane, how will the WBC most likely take it in?
a. exocytosis
b. pinocytosis
c. facilitated diffusion
d. phagocytosis
Answer: d. phagocytosis
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An herbivore
(a) eats plant material. (b) eats producers. (c) is exemplified by a deer. (d) is all of the above.
The name “virus” is appropriate because it is derived
from Latin meaning a. small. b. powerful. c. poison. d. dangerous. e. disease.
Which organisms have a hydrostatic skeleton with a
soft body wall? a. earthworms b. spiders c. sponges d. crabs e. insects
Sexual reproduction reorganizes genetic material but doesn't create it; how does new genetic information appear in a population?
A) from the fusion of chromosomes from two individuals B) from chromosome-sorting errors in mitosis C) permanent changes, called mutations, alter the molecular structure of a gene D) from the pairing and sorting of different alleles E) from the union of two gametes, each produced within a separate individual