Two tubes are inoculated from one test tube of a bacterial culture. The cultures are then transferred every day for 2 months. All of the media and growth conditions are the same in every tube
After 2 months of cultivation, the fitness and genotype frequencies of the populations in the two tubes are compared. The fitness of the two cultures is the same, but the genotype frequencies are very different in the two cultures. How is this possible?
A) Two months is not long enough for different fitness levels to evolve even if the genotype frequencies change.
B) This result is not possible because different genotype frequencies would result in different fitness levels under the same growth conditions.
C) Natural selection caused the evolution of different genotype frequencies within the separate test tubes.
D) Genetic drift within the small populations in the test tubes resulted in different genotype frequencies.
Answer: D
You might also like to view...
True or False. Phylogenetic trees represent hypotheses about the evolutionary relationships between groups of organisms
A. true B. false
Without changing the sequence or the orientation of the sequence(s), which is/are complementary to the sequence 5' AGGCUAAC 3'?
A. 5' TCCGATTG 3' B. 3' TCCGATTC 5' C. 5' CTTAGCCT 3' D. 3' TAAGCTTA 5' E. 3' TCCGATTC 5' AND 5' CTTAGCCT 3'
Which types of chromosomes provide the basis for sex determination in most mammals?
A) haploid set of chromosomes B) diploid set of chromosomes C) autosomes D) sex chromosomes E) homologous chromosomes
Respond to statements 104–108 in reference to the four source
tissues of plant roots listed below. a. primary meristems b. primary tissues c. pericycle d. vascular cambium M 104. This tissue gives rise to epidermis and cortex. D 105. This tissue gives rise to protoderm and procambium. D 106. This tissue gives rise to ground meristem. M 107. This tissue gives rise to cork cambium. D 108. This tissue gives rise to secondary phloem and xylem.