Which one of the following populations would most quickly lead to two groups with few shared traits?
1. | a population with disruptive selection |
2. | a population with directional selection |
3. | a population with stabilizing selection |
4. | a population with no selection |
Sweet potato is homologous to:
1. | Potato | 2. | Colocasia |
3. | Ginger | 4. | Turnip |
The bones of forelimbs of whales, bats, cheetahs, and men are similar in structure, because:
1. | one organism has given rise to another |
2. | they share a common ancestor |
3. | they perform the same function |
4. | they have biochemical similarities |
The appearance of antibiotic-resistant bacteria is an example of:
1. adaptive radiation
2. transduction
3. pre-existing variation in the population
4. divergent evolution
The most accepted line of descent in human evolution is:
1. | Australopithecus → Ramapithecus → Homo sapiens → Homo habilis |
2. | Homo erectus → Homo habilis → Homo sapiens |
3. | Ramapithecus → Homo habilis → Homo erectus → Homo sapiens |
4. | Australopithecus → Ramapithecus → Homo erectus → Homo habilis → Homo sapiens. |
Variations during mutations of meiotic recombinations are:
1. random and directionless
2. random and directional
3. small and directional
4. random, small and directional
Which statement most accurately reflects what population geneticists refer to as "fitness"?
1. | Fitness is the measure of an organism's adaptability to various habitats. |
2. | Fitness reflects the number of mates each individual in the population selects. |
3. | Fitness refers to the relative health of each individual in the population. |
4. | Fitness is a measure of the contribution of a genotype to the gene pool of the next generation. |
The concept of genetic bottlenecks includes which of the following?
1. | a loss of genetic diversity in descendent populations |
2. | extensive gene flow |
3. | sharing of genetic material between two populations |
4. | increased ability to resist new diseases |
Stabilizing selection acts to _________ in a species' population.
1. elaborate new traits
2. alter traits
3. push for directional change
4. maintain a certain phenotype
Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?
1. | Overproduction, variations, constancy of population size, natural selection |
2. | Variations, constancy of population size, overproduction, natural selection |
3. | Overproduction, constancy of population size, variations, natural selections |
4. | Variations, natural selection, overproduction, constancy of population size |