Unit 6-Evolution - Practice Exam Parts A and B-1

Sep 30, 2026

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Practice exam focused on core evolution and genetics concepts. Questions address how habitat destruction can reduce population size, how new species develop through genetic change, and how a gene pool is defined by heritable genes. The exam also tests inferences from population graphs, mechanisms that change gene frequencies, and requirements for evolution such as variation and successful reproduction. Additional items cover natural selection explanations, inheritance and evolutionary change, and antibiotic overuse selecting for resistant organisms.

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Reading Time28 min

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Unit 6-Evolution - Practice Exam Parts A and B-1

Questions A-B-1

Unit 6-Evolution Living Environment Practice ExamParts A and B-1 1. As a result of habitat destruction, the size of the Florida panther population has been drastically reduced. It is estimated that there are only 100 to 160 Florida panthers in the wild. Which statement best explains why the Florida panther population may not continue to evolve? A) There is no longer a chance of mutations occurring in the population. B) There is a lack of competition for limited environmental resources. C) There is no longer a chance of a trait providing a reproductive advantage to the population. D) There is a lack of genetic variation for selection to act upon. 2. In order for new species to develop, there must be a change in the A) temperature of the environment B) migration patterns within a population C) genetic makeup of a population D) rate of succession in the environment 3. A gene pool consists of A) all the genes that mutate in a single generation B) all the heritable genes for traits in a population C) all the gametes produced by a population D) the mutated alleles for a particular trait 4. The graph below shows the changes in the number of individuals in a population who have a specific trait. Which statement concerning this trait is a valid inference? A) As time passed, an increasing number of individuals with this trait survived and reproduced. B) Individuals can acquire new survival characteristics over time and pass them on to their offspring. C) The longer a species is in an environment, the less likely it is that mutations will occur within the species. D) The number of traits a species possesses has a direct relationship to the amount of time the species will exist. 5. A major factor in changing the frequencies of the genes in the gene pool of a population is A) domestication B) migration C) asexual reproduction D) random mating 6. Evolution can occur at different rates; however, for evolution to occur, there must be A) variations within a species B) extinction of the species C) asexual reproduction D) no change in the genes of an organism Unit 6-Evolution 7. In order for a species to evolve, it must be able to A) consume a large quantity of food B) reproduce successfully C) maintain a constant body temperature D) be domesticated 8. The graph below represents the populations of two different species in an ecosystem over a period of several years. Which statement is a possible explanation for the changes shown? A) Species A is better adapted to this environment. B) Species A is the predator of Species B. C) Species B is better adapted to this environment. D) Species B is a parasite that has benefited species A. 9. Some behaviors such as mating and caring for young are genetically determined in certain species of birds. The presence of these behaviors is most likely due to the fact that A) birds do not have the ability to learn B) individual birds need to learn to survive and reproduce C) these behaviors helped birds to survive in the past D) within their lifetimes, birds developed these behaviors 10. Many scientists believe that the earliest cells on Earth were relatively simple, lacking nuclear membranes and other organized cellular structures. Over time, more complex cells developed from these simple cells. These statements describe the concept of A) inheritance of acquired characteristics B) evolution C) dominance D) use and disuse Unit 6-Evolution 11. The diagram below represents the same field of mice hunted by a hawk over a period of three months. The overall changes in the population of mice can be explained best by A) natural selection B) succession C) reproduction D) mouse extinction 12. The diagram below represents one possible evolutionary change that could have led lobe-finned fish to develop into the first amphibians. Amphibians are animals that live on land some of their life. This change fr

FAQs

Why might the Florida panther population fail to continue evolving after habitat destruction?

A key reason is reduced genetic variation, which limits selection from acting on traits that could provide a reproductive advantage.

What is required for evolution to occur?

Evolution requires variations within a species and the presence of selection pressures that change gene frequencies over time.

How does overuse of antibiotics affect bacterial populations like Streptococcus?

Overuse selects for resistant organisms, allowing them to survive and increase in frequency despite treatment.

Sep 30, 2026

Upload by noah