4 Acquired characteristics 1. 7d.When tigers prey on antelopes some antelopes will escape. Which part of Darwin’s theory would support this situation?Acquired characteristicsReproductive isolationSpeciation due to mutationsSurvival of the fittest
5 transmit characteristics acquired by use or disuse to their offspring. 2. 7d. According to Darwin’s theory of natural selection, the individuals that tend to survive?transmit characteristics acquired by use or disuse to their offspring.have undergone mutationshave the smallest # of offspring.have variations best suited to the environment.
6 3. In an environment where food is scarce, there are two groups of snakes. Snake Group A can live without food longer than Snake Group B. Natural selection favors Snake Group A, because they are better adapted and thus more likely to-----?A. drink more than Snake Group B.B. eat less than Snake Group B .C. Avoid more predators than Snake Group B.D. Reproduce more than Snake Group B
7 4. 7d. If a predator fox hunts only homozygous white rabbits (aa) instead of brown rabbits (AA and Aa), how would it be possible for future generations of rabbits to produce white rabbits?It is not possible to have future white rabbits.The only possible way white rabbits could be produced would be by mutations.Heterozygous brown rabbits can pass on recessive “a” allele.
9 C. Homologous structures D. Favorable adaptations 6.7d Characteristics of a species that make its members better able to live and reproduce in their environment are known asA. Biotic factorsB. Abiotic factorsC. Homologous structuresD. Favorable adaptations
10 7.7d Variations within a species are most likely the result of A. Mutations and sexual reproduction.B. Mitosis and reproduction.C. Overpopulation and recombinationD. Synapsis and disjunction
11 8. 7d. If a mutation introduces a new feather color in a bird population, which factor might determine whether the frequency of the new allele will increase?Whether the mutation makes some birds more fit for their environment than other birds.How many other alleles are present.Whether the mutation was caused by nature or by humans.How many phenotypes the population has.
12 9. 7d. How can lethal alleles be preserved in a gene pool? Lethal alleles cannot be preserved in a gene pool.B. Lethal alleles can be preserved by gene regulation.C. Lethal alleles do not result in death and therefore can be maintained in a gene pool.D. Lethal alleles can be preserved in a gene pool in heterozygous individuals.
13 10. 7d. A large population of flies was sprayed with a newly developed, fast-acting insecticide. The appearance of some flies that are resistant to this insecticide supports the concept thatthe environment does not change.B. Species traits tend to remain constantC. Variation exists within species.D. Biocides cause mutations.
14 11.7d Several species of birds live in a forest that is destroyed by fire.Which species is more likely to have at least some members survive the fire?A. The species that is most evolved.B. The species with the most mutations.C. The species that is most specialized.D. The species with the most variation.
16 A. Evolution will not take place within that population. 12. 7E What will most likely happen if the gene frequencies in a given population remain constant?A. Evolution will not take place within that population.B. Evolution within that population will occur at a faster rate.C. Recessive characteristics will increase in the population.D. Dominant characteristics will increase in the population.
17 13. 7E The situation in which allele frequencies remain constant is called A. EvolutionB. Natural SelectionC. Genetic DriftD. Genetic EquilibriumE. Mutations Occur
18 14. 7E The gene frequencies in a population would most likely change if the following occurred. A. mutationsB. A stable environmentC.It develops into a large populationD. Random mating
19 15. 7E Which condition would most likely produce a change in the gene pool of a population? Larger population have greater variation and less chances of evolving.A. No mutations in the population.B. Migrations out of the population.C. Nonrandom mating in the population.D. A large population.
20 16. 7E A species is likely to remain unchanged if A. Natural selection affects all members of the species.B. Some individual members of the species become isolated.C. All members of the species migrate to a new environment.D. The gene pool of the species remains stable.
22 17. 8C Genetic drift tends to occur in populations that A. are very large.B. are small.C. are formed from new species.D. have unchanging allele frequencies.
23 18. 8C Which result is the effect of genetic drift on a small interbreeding population? A. The population tends to be more evolved.B. There is little effect.C. The genes in the population tend to be more heterogeneousD. The genes of the population tend to be more homologous.
24 19. 8C Which result is the effect of genetic drift on a very large breeding population? A. There is little effect.B. The genes of the population tend to be more homologousC. The genes of the population tend to be more heterogeneousD. The population tends to be more evolved.
25 20. 8D A factor that is necessary for the formation of a new species is A. Reproduction at different times.B. Geographical barriers.C. Different mating behaviorsD. Reproductive Isolation
26 21. 8D Australia is thought to have separated from a supercontinent thousands of years ago. This change had what main effect on animals living in Australia?A. They became more predatory and territorial.B. They distributed themselves evenly throughout the continent.C. They evolved differently from animals in the rest of the world.D. They died out because they were separated from organisms they depended on.
27 22. 8D The geographical isolation of two populations of a species tends to increase differences between their gene pools because itA. prevents interbreeding between the populations.B. prevents interbreeding within each population.C. causes temporal isolation of the two populations.
29 23. 8B Which of the following is most likely to cause a decrease in a predator population ? A. A sudden environmental change.B. An increase in prey.C. Diversity within the population.D. A reduction in competition.
30 24. 8B Which group would be most likely to survive a major environmental change? A. A very specialized group.B. A group of producers.C. A very diverse group.D. A group of predators.
31 25. 8B Organisms become diverse as a result of? A. Inherited traits.B. Inbreeding.C. Genetic mutations.D. Population increases.
32 A. Natural Selection. B. Extinction. 26. 8B What occurs when the adaptive characteristics of a species are not enough for the species to survive in a changed environment?A. Natural Selection.B. Extinction.C. Predation.D. Speciation.
33 27. 8B Diversity of species in an ecosystem helps to ensure that at least some species ____? A. are related to a common ancestor.B. will become extinct.C. will survive changes in the ecosystem.D. will evolve.
35 28. 8E To be useful as an index fossil, a species must have existed for A. Long periods over a wide geographic range.B. Long period over a small geographic rangeC. Short periods over a wide geographic rangeD. Short period over small range.
36 29. 8E The length of time required for half of the radioactive atoms in a sample to decay is its A. Half-LifeB. Relative DateC. Index FossilD. None of the above
37 30. 8E A mass extinction would encourage the rapid evolution of the surviving species A. by changing developmental genesB. by opening ecological niches.C. Because it killed all organisms that had coevolved.