Evolution MCQs

Analyze these statements concerning evolutionary theories before and after Darwin:

I. Lamarck proposed that evolution is driven by the use and disuse of organs.
II. Lamarck's classic example was the elongation of necks in Giraffes to forage leaves on tall trees.
III. Darwin was influenced by the work of Alfred de Musset on human populations.

Select the correct statement(s):

Read the following statements about the mechanism of evolution:

I. Hugo de Vries proposed the idea of mutation based on his work on evening primrose.
II. According to de Vries, mutations are small, random, and directional.
III. Darwinian variations are small and directional, leading to gradual evolution.
IV. Hugo de Vries called single-step large mutation saltation.

Which option contains the correct statements?

Concerning the Hardy-Weinberg Principle, evaluate the following:

I. Allele frequencies in a population are unstable and fluctuate randomly from generation to generation.
II. The total gene pool remains a constant, which is called genetic equilibrium.
III. The sum total of all allelic frequencies is greater than 1.
IV. In a diploid, the frequency of heterozygous individuals is represented as 2pq.

Which of the statements are correct?

Which of the following factors affect the Hardy-Weinberg genetic equilibrium?

I. Gene migration / Gene flow
II. Genetic drift
III. Mutation
IV. Genetic recombination
V. Natural selection

Select the correct combination:

Read the statements below regarding genetic drift and speciation:

I. If a change in allele frequency occurs entirely by chance, it is called genetic drift.
II. The original drifted population becomes founders, and the change in allele frequency is called the founder effect.
III. Genetic drift maintains the Hardy-Weinberg equilibrium without any disturbance.

Which of the statements are correct?

Review these statements about the operations of natural selection on different traits:

I. In stabilising selection, more individuals acquire the mean character value.
II. In directional selection, more individuals acquire peripheral character values at both ends of the distribution curve.
III. In disruptive selection, more individuals acquire value other than the mean character value.

Which of the statement(s) is/are correct?

Read the statements regarding geological periods and the origin of organisms:

I. Invertebrates were formed and active by 500 mya.
II. Jawless fish probably evolved around 350 mya.
III. Sea weeds and few plants existed probably around 200 mya.
IV. The first organisms that invaded land were plants.

Which of the above statements are correct?

Consider the transition of vertebrates from water to land:

I. Lobefins were fish with stout and strong fins that could move on land and go back to water.
II. In 1938, a Coelacanth fish caught in South Africa was identified as a lobefin, which was thought to be extinct.
III. Lobefins evolved into the first reptiles.
IV. Modern-day frogs and salamanders are descendants of early amphibians.

Select the correct statements:

Analyze these statements concerning prehistoric reptiles and dinosaurs:

I. Reptiles lay thick-shelled eggs which do not dry up in the sun unlike those of amphibians.
II. Ichthyosaurs were land reptiles that went back to water to evolve into fish-like reptiles around 200 mya.
III. Tyrannosaurus rex was about 20 feet in height and had huge, fearsome, dagger-like teeth.
IV. Dinosaurs suddenly disappeared from the Earth about 350 mya.

Which of the statements are correct?

Regarding early mammals and continental drift, analyze the following:

I. The first mammals were tiny, shrew-like creatures whose fossils are small.
II. Mammals were oviparous and laid thick-shelled eggs to protect their young.
III. When South America joined North America, South American mammals were overridden by North American fauna.
IV. Pouched mammals of Australia survived because of continental drift and lack of competition.

Select the correct combination of statements: