Biological hazardous waste bags should be what color?
a. Green or Blue
b. Red or Red-Orange
c. Clear or Black
Answer: b. Red or Red-Orange
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The feeding mode of hagfishes is considered:
a. predation. b. scavenging. c. suspension feeding. d. both a and b. e. b and c only.
The original three components of the cell theory are that all organisms
A. have DNA, DNA is the fundamental unit of life, and all cells come from preexisting cells. B. are made of one or more cells, the cell is the fundamental unit of life, and all cells come from preexisting cells. C. are made of one or more cells, the cell is the fundamental unit of life, and all cells have a nucleus. D. have DNA, are made of cells, and all cells produce proteins. E. are made of one or more cells, all cells contain DNA, and all cells come from preexisting cells.
A biologist doing a long-term study on a wild spider population observes increased variation in silk thickness. Which of the following could the spider population be experiencing?
A) directional selection B) stabilizing selection C) disruptive selection D) genetic drift
Green and yellow wavelengths of light are useless to most plants.
a. true b. false