Which of the following statements about algae is FALSE?
A) The group includes seaweeds and kelps.
B) They are photosynthetic organisms.
C) They provide most of the oxygen on Earth.
D) They are important in the degradation of dead plants and animals.
E) They are a source of food for aquatic and marine animals.
D
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Bacterial strains that are characterized by biochemical differences are called ________.
Fill in the blank(s) with the appropriate word(s).
When the noncompetitive inhibitor is bonded to the enzyme, the shape of the ____ is distorted.
Fill in the blank(s) with the appropriate word(s).
In the absence of predators, what do you think was the main selection factor affecting the average number of spots on male guppies?
a. an infectious disease that influenced pigment deposition in guppy integument b. sexual selection by females for males with high spot numbers c. a completely random process d. none of the above
Substances that alter sensory perception, cause
disorientation, and inhibit the ability to perform complex tasks are a. depressants. b. stimulants. c. analgesics. d. hallucinogens. e. antipsychotics.