Punjab 12th Class Biology Chapter 24 Evolution Mcqs Test Online

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Question 1 of 15

Biology

1. The process of ---------- and ----------- generate variation, and ------------ produces adaptation to the environment.

1.Genetic drift ------ mutation ------ sexual recombination

2.Mutation ------- natural selection ------ genetic drift

3.Mutation -------- sexual recombination ------ natural selection

4.Sexual recombination ------natural selection -----mutation

Question 1 of 15

Question 2 of 15

2. In science the term theory generally applies to an idea that:

1.Is a speculation lacking supportive experiments.

2.Is synonymous with what biologist means by hypothesis

3.Attempts to explain many related phenomena.

4.Is considered a law of nature

Question 2 of 15

Question 3 of 15

3. Which of the following pairs of structures is least likely to represent homology?

1.The haemoglobin of a baboon and that of a gorilla

2.The brain of a cat and that of a dog

3.The wings of a bat and the forelimbs of a human

4.The wings of a bird and those of an insect

Question 3 of 15

Question 4 of 15

4. Natural selection is sometimes describe as survival of the fittest. Which of the following most accurately measures an organisms fitness?

1.How much food it is able to make or obtain

2.Its ability to withstand environmental extremes

3.How many fertile offspring it produces

4.Its mutation rate.

Question 4 of 15

Question 5 of 15

5. Using the Hardy-Weinberg Principle, which expression represents the frequency of the homozygous recessive genotype?

1.q²

2.d. q

3.P²

4.2Pq

Question 5 of 15

Question 6 of 15

6. _________ is a vestigial organ

1.None of these

2.Vermiform appendix

3.Papillae

4.Intestinal villi

Question 6 of 15

Question 7 of 15

7. Which of the following is a true statement about Charles Darwin?

1.He based his theory on the inheritance of acquired characteristics.

2.He worked out the principle of population genetics.

3.He proposed natural selection as the mechanism of evolution

4.He was the first to discover that living things can change, or evolve

Question 7 of 15

Question 8 of 15

8. The experiment that simulated conditions thought to be present on the early earth

1.Miller – Urey experiment

2.Geiger – Marsden experiment

3.Schiehallion experiment

4.Hershey – Chase experiment

Question 8 of 15

Question 9 of 15

9. Which condition can be explained by Lamarckism?

1.How humans became bipedal

2.All of these

3.How giraffes got their long neck

4.How humans lost their tail

Question 9 of 15

Question 10 of 15

10. Which of the following ideas is common to both Darwin’s and Lamarck’s theories of Evolution?

1.Evolution drives organisms to greater and greater complexity.

2.The fossil record supports the view that species are fixed

3.Adaptation results from different reproductive success

4.Evolutionary adaptation results from interactions between organisms and their

Question 10 of 15

Question 11 of 15

11. All organisms share the same genetic code. This commonality is evidence that:

1.Evolution occurs gradually from

2.Convergent evolution has occurred

3.All organisms are descended from a common ancestor

4.Evolution is occurring now

Question 11 of 15

Question 12 of 15

12. The force that initiates evolution is _________

1.Mutation

2.Adaptation

3.Extinction

4.Variation

Question 12 of 15

Question 13 of 15

13. The earliest geological time period among the following is __________.

1.Jurassic

2.Permian

3.Cambrian

4.Quaternary

Question 13 of 15

Question 14 of 15

14. Which of the following is an example of vestigial structure in humans?

1.Human tailbone

2.Nipple on male mammals

3.Sixth finger found is some humans

4.Human knee cap

Question 14 of 15

Question 15 of 15

15. The smallest biological unit that can evolve over time is:

1.An individual organism

2.A population

3.An ecosystem

4.A specie

Question 15 of 15

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