The “naked” seeds of conifers develop ____
a. on scales of the ovulate cones
b. on scales of pollen cones
c. in microsporangia of pollen cones
d. in archegonia of ovulate cones
e. in antheridia of pollen cones
ANSWER: a
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The occurrence of which of the following events would indicate that a population was not in Hardy-Weinberg equilibrium? a. Mating is random
b. All individuals survive and produce the same number of offspring. c. No gene flow occurs between the population and others of that species. d. Mutations are rare.
Within an ecosystem, plants are known as producers or ____
a. heterotrophs b. consumers c. “other feeders” d. decomposers e. autotrophs
________ is a predator that bores a hole through the outer membrane of its Gram-negative bacterial prey and then reproduces in the periplasm.
A. Mycococcus B. Bdellovibrio C. Vampirococcus D. Syntrophobacter
What is the usual size range of viruses?
A. 30 to 300 nanometers B. 20 to 300 micrometers C. 20 to 300 millimeters D. 20 to 300 centimeters