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A population of finch birds with medium sized beaks colonizes an island with plants producing medium and large sized seeds. After a disease wipes out all the plants with medium sized seeds, what is most likely to happen to the finches?

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Important Questions on Evolution

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Read the following statements:

(i) When reptiles came down mammals took over this earth.

(ii) Around 65 million years ago, some land reptiles went back to water and evolved into fish-like reptiles, called Ichthyosaurs.

(iii) Dinosaurs became extinct 200 million years ago.

(iv) The first mammals were like shrews.

Which of the above statements are incorrect?

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If in a population gene frequency of A is 0.1 the frequency of allele 'a' will be _____.
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Which of the following is an incorrect statement?
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Which of the following is not an example of anthropogenic action?
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Assertion (A) Natural selection is an outcome of the differences in survival and reproduction among individuals that shows variations in one or more traits.
Reason (R) Adaptive forms of a given trait tend to become more common. Less adaptive ones become less common or disappear.
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Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution?
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Consider the following statements and select the correct option stating which one is true (T) and which one is false (F).

(i) Tyrannosaurus was the biggest dinosaur about 20 feet in height and had huge fearsome dagger–like teeth.

(ii) Some land reptiles went back into water to evolve into fish–like reptiles probably 200 million years ago.

(iii) According to the theory of spontaneous generation, “panspermia” was transferred to different planets from outer space, including earth.

(iv) According to Darwin, there has been gradual evolution of life forms.

(v) Homology is based on convergent evolution, while analogy refers to a situation exactly opposite.

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The frequency of recessive alleles in a population is 0.2. The number of heterozygotes in a population of 500 is: