According to the Biological Species Concept, two groups of organisms that are unable to form fertile, viable hybrids are considered to be different
A. species.
B. races.
C. kingdoms.
D. cohabitants.
E. hybrids.
Answer: A
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The sporophyte generation
A. is diploid. B. is haploid. C. is not found in ferns. D. produces sex cells.
Which of the following circumstances would cause exponential growth to move into a logistic growth phase?
A. habitat alteration resulting in the conversion of 1,200 acres of forests into agricultural fields and housing developments B. the introduction of a non-native predator into the environment C. a reduction in the number of females within the population D. a large increase in the population over three generations E. All of these would cause exponential growth to move into logistic growth.
If the frequency of a recessive gene in a population in genetic equilibrium is 40 percent, in the next generation, the frequency of that gene would be ____.
A. 20 percent B. 40 percent C. 80 percent D. 2pq E. unpredictable
You find colorless areas in cells in a Gram-stained smear. What should you do next?
a. A capsule stain b. A simple stain c. A flagella stain d. An endospore stain e. An acid-fast stain