Quiz #6 - Natural Selection and Evolution Practice

Sep 30, 2026

Practice quiz covering core concepts in natural selection and evolution. Questions address how environments influence selection, how allele changes occur, and which scenarios do not drive natural selection. Students examine isolation based on geography, the role of heterotrophs in taking in organic molecules, and real examples of evolutionary change such as antibiotic resistance. Additional items explain how new genes arise and what biological processes generate atmospheric oxygen through aerobic respiration and photosynthesis.

LanguageEnglish

CategoryExam

FormatPDF

Pages1

Reading Time3 min

AccessFree to download

Natural selection basics

Isolation and examples

Evolution processes

Genes and atmospheric oxygen

Quiz \#6-key 1. Natural selection is a theory that states the environments will force selection of the best: a. physical skills b. heritable traits c. location d. predator 2. All changes to alleles occur because of a. genetic diversity b. random mating c. overpopulation d. mutations 3. Which of the following would most likely not lead to natural selection? a. birds with longer beaks get the more food b. longer whales mate more successfully c. a monkey finds an easy source of food d. darker tigers are selected as mates more often 4. Which of the following is does not drive the Darwin Wallace theory of natural selection? a. organisms always produce too many offspring b. organisms are genetically diverse c. organisms have to struggle for survival d. none of the above 5. Which of the following exhibits isolation based on geography? a. birds on island A and mammals on island B b. fish in the water between island A and island B c. trees on island A and bushes on island B d. different species of sunflowers on island A and island B 6. Heterotrophs must take into their cells. a. oxygen b. carbon dioxide c. organic molecules d. ultraviolet light 7. In a population of sea turtles all of the following could be examples of natural selection except a. large females lay more eggs than small females. b. large males have more wounds from fights than small males. c. large males mate with more females than small males. d. small females are more likely to be killed by sharks than large females. 8. Which one of the following is an example of evolution? a. many species of bacteria have become resistant to antibiotics b. many species of bacteria mutate when exposed to ultraviolet light c. many species of bacteria are killed by antibiotics d. new species of bacteria arise as a result of exposure to antibiotics 9. New genes become present as a result of a. mutations. b. reproduction. c. natural selection. d. evolution. 10. The oxygen in the earth’s atmosphere is the result of a. oxygen released from volcanoes. b. organisms that carry on aerobic respiration. c. since the early earth was hot water broke down into hydrogen and oxygen. d. organisms that carry on photosynthesis.

FAQs

What is the main idea of natural selection in this quiz?

Natural selection is described as the environment forcing selection of individuals with the best heritable traits.

Which change would most likely not lead to natural selection?

An option where the trait advantage is not tied to heritable differences driving differential survival or reproduction, such as the quiz’s incorrect choice among the four scenarios.

Where does atmospheric oxygen come from, according to the quiz options?

The quiz indicates atmospheric oxygen results from organisms that carry on aerobic respiration and from organisms that carry on photosynthesis.

Sep 30, 2026

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