Evolution MCQs

Consider the following statements regarding the origin of the universe and early Earth:

I. The universe is almost 20 billion years old.
II. Hydrogen and Helium were formed before the expansion of the universe.
III. Earth was formed about 4.5 billion years ago.
IV. There was a thick, protective oxygen-rich atmosphere on early Earth.

Which of the above statements are correct?

Read the following statements about early theories on the origin of life:

I. Panspermia is the theory that units of life called spores were transferred to different planets, including Earth.
II. Louis Pasteur demonstrated that life can arise spontaneously from killed yeast in sealed, pre-sterilised flasks.
III. Oparin of Russia and Haldane of England proposed that chemical evolution preceded the formation of life.

Which of the combinations contains only correct statements?

Consider the experimental conditions set up by S.L. Miller in 1953:

I. He created an electric discharge in a closed flask.
II. The gaseous mixture consisted of CH₄, H₂, NH₃, and water vapour.
III. The temperature maintained in the flask was 800°C.
IV. He observed the direct formation of self-replicating metabolic capsules of life.

Which of the statements are correct?

Review these statements concerning Charles Darwin's observations and theories:

I. He conducted observations during a sea voyage round the world on a sail ship called H.M.S. Beagle.
II. He concluded that existing life forms share similarities only among themselves, not with extinct ones.
III. Fitness, according to Darwin, refers ultimately and only to reproductive fitness.
IV. Natural selection is proposed as a mechanism of evolution.

Select the option containing the correct statements:

With respect to embryological evidence of evolution, consider these statements:

I. Ernst Heckel proposed embryological support based on certain features during embryonic stages common to all adult vertebrates.
II. Vertebrate embryos develop a row of vestigial gill slits behind the head, which is functional only in fish.
III. Karl Ernst von Baer approved Heckel's proposal after observing that embryos pass through the adult stages of other animals.

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

Read the following statements about comparative anatomy:

I. Whales, bats, Cheetah, and humans share anatomical similarities in the pattern of forelimb bones.
II. The forelimbs of these mammals represent analogous organs.
III. These forelimbs possess humerus, radius, ulna, carpals, metacarpals, and phalanges.
IV. The developmental pattern of these limbs represents divergent evolution.

Which of the above statements are correct?

Identify the correct statements regarding homology and analogy from the list below:

I. Thorns of Bougainvillea and tendrils of Cucurbita represent homology.
II. Eyes of the octopus and eyes of mammals represent analogy.
III. Sweet potato (stem modification) and potato (root modification) represent analogy.
IV. Homology is based on convergent evolution, whereas analogy is based on divergent evolution.

Which of the following is correct?

Consider the phenomenon of industrial melanism in England:

I. Before industrialisation, there were more dark-winged or melanised moths on trees than white-winged moths.
II. After industrialisation (1920), the proportion of dark-winged moths decreased significantly.
III. Tree trunks became dark post-industrialisation due to industrial smoke and soot.
IV. Lichens can grow in highly polluted environments and act as soot collectors.

Choose the correct option:

Read the statements below about natural selection and adaptation:

I. Natural selection is a highly directed process based on deterministic laws of nature.
II. Excess use of herbicides and pesticides results in the selection of resistant varieties in a short time scale.
III. Resistant microbes appear in a time scale of months or years, which is an example of evolution by anthropogenic action.

Which statements are correct?

Regarding Adaptive Radiation, analyze the following statements:

I. It is the process of evolution of different species in a given geographical area starting from a point and radiating to other habitats.
II. Darwin's Finches are an example of adaptive radiation where original seed-eating birds evolved altered beaks to become insectivorous and vegetarian.
III. When more than one adaptive radiation occurs in an isolated geographical area, it represents divergent evolution.

Which of the statements are correct?