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Class 12 Biology Chapter 7 Evolution Quiz 2 (25 MCQs)

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1. A population of snails has the dominant trait of brown stripes and the recessive trait of solid brown shell color. If the current population has 17% solid brown, what is the expected frequency of homozygous striped shells?
2. During a hurricane, a population of beetles almost gets completely wiped out. The only beetles that survived were lucky that they were in their nest at the time of the hurricane and had enough food to survive.
3. Which of the following best describes the concept of natural selection in the context of evolution?
4. What type of reproductive isolation is this example:Mating a Different Time of Day
5. Darwin was not the first to develop a theory of ..... , but his therooy is the one best supported by evidence today.
6. A well-tested concept that explains a wide range of observations is called a(an):
7. Had idea that acquired traits would be passed to offspring.
8. What is the significance of the fossil record in understanding evolution?
9. These scientists proved that organic molecules formed from inorganic molecules present in the Earth's early atmosphere when given energy from lightening.
10. A mutation can be
11. Which is not an example of an adaptation?
12. The discovery of a fossilized animal with teeth, a long bony tail, and feathered wings helped to establish which evolutionary sequence?
13. The disproven mechanism of evolution that states organisms can pass on physical traits gained through behaviors in their lifetimes.
14. True or False:Natural Selection favors only the fittest phenotypes among existing variations within the population, which may not be the ideal trait
15. A human appendix, a whale's hip bones and a human tail are all:
16. What did Darwin observe on the coastline that lead him to understand the age of the Earth?
17. Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian islands have different elaborate courtship rituals that involve fighting other males and stylized movements that attract females. What type of reproductive isolation does this represent?
18. What is speciation?
19. A characteristic or trait that helps an organism survive in its environment is a/an (a)
20. Which is an example of a trait that is an adaptation for cold climate but not for warm climate?
21. Measure of an organisms's ability to survive and produce offspring relative to other members of a population
22. This occur because of the several mutagens like ultraviolet radiation and hazardous chemicals in the environment that can affect genes and chromosomes.
23. Which of following is NOT example of bacteria?
24. What barrier inhibits the formation of a mule (offspring of horse and donkey that is sterile)?
25. ..... show clear changes in an organism over time, the environment organisms lived in, the time period the organism lived in, and where the organism lived.
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