Which type of fossil is considered a trace fossil?
a. footprint
b. shell
c. seeds
d. teeth
e. spores
ANSWER: a
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If a population is not in Hardy-Weinberg equilibrium, this implies that
A. the population is going extinct. B. the population is very ancient. C. one or more of the conditions required for equilibrium are being violated. D. the population is abnormal. E. one or more of the conditions required for equilibrium are being violated and the population is evolving.
Carbapenem-resistant Enterobacteriaceae (CRE) are typically resistant to carbapenem but sensitive to most other antibiotics.
a. true b. false
All populations of all species in a specified area __________
Fill in the blank(s) with the appropriate word(s).
Which of the following defines the essential gene set of an organism such as a species of yeast?
A) genes that, when mutated, reduce the growth of a heterozygous organism B) genes whose deletion alleles are not found among haploid offspring C) the fewest genes that, when mutated, result in slow growth in optimal environments D) genes whose mutations result in haploinsufficiency E) genes that, when mutated, are either lethal or conditionally lethal in special environments