All Free Biology MCQs with Answers

• A. Appendix
• B. Coccyx
• C. Both A and B
• D. None of these

Explanation: The appendix is a small finger-like organ that comes off the first part of the large intestine.

• A. All were unique to individual islands
• B. All finches were red beaked
• C. Some were unique to individual islands and some were present on many islands
• D. Majority were unique to individual islands

Explanation: Among the birds Darwin collected on the Galapagos were 13 types of inches that, although quite similar, seemed to be different species.

• A. More Offspring
• B. No Offspring
• C. Less Offspring
• D. All Offspring

Explanation: Survival in the struggle for existence is not random, but depends in part on the hereditary constitution of the surviving individuals.

• A. Distant continents
• B. Neighboring continents
• C. Other continents
• D. These continents

Explanation: The evolutionary view of biogeography predicts that contemporary armadillos are modified descendants of earlier species that occupied…

• A. Formation of endomembrane system
• B. Membrane modification
• C. Second membrane for protochloroplast
• D. Second membrane dissolve

Explanation: The membrane invagination hypothesis, which is a proposed explanation for the origin of eukaryotic cells and their endomembrane system…

• A. Fauna of South America
• B. Flora of South America
• C. Fauna and flora of South America
• D. Fauna and anti flora of North America

Explanation: Charles Darwin was born in Shrewsbury, in Western England, in 1809. He joined ' the expedition on Beagle to the South American coastline.

• A. Population pool
• B. Species pool
• C. Gene pool
• D. All of these

Explanation: The set of all genes of a population is sppecifically called a gene pool.

• A. Taxonomics
• B. Phylogenetic
• C. Homologous
• D. Analogous

Explanation: Analogous structures are those having the same function but different structures.

• A. Essay on Population by Malthus
• B. Lamarck's theory
• C. L-Miller's evidence for origin of life
• D. Mendel's paper on inheritance

Explanation: Charles Darwin was greatly influenced by the Essay on the Principle of Population by Thomas Robert Malthus.

• A. Insects wings and bat's wings
• B. Forelimb of mole and bird's wings
• C. Forelimb of man and bat's wings
• D. Forelimb of man and horse

Explanation: Analogous organs are organs that have different structures but perform the same function.

• A. Wallace
• B. Lamarck
• C. Lyell
• D. Darwin

Explanation: Fact: The first objective definition of instincts in terms of animal behaviour was proposed by Darwin.

• A. How new species arise
• B. How adaptations evolve
• C. The origin of life
• D. The genetics of evolution

Explanation: Darwin perceived the origin of new species and adaptations as closely related processes.

• A. Decent with modification
• B. Struggle for existence
• C. Survival of the fittest
• D. Mutation

Explanation: Darwin's theory of natural selection primarily focuses on "Descent with modification," "Survival of the fittest," and the "Struggle for…

• A. Although quite different seemed to be of same species
• B. Although quite similar, seemed to be of different species
• C. Separated from original habitats by geographical barriers
• D. Some were unique to individual islands

Explanation: Most of the animal species on the Galapagos live nowhere else in the world, although they resemble species living on the South American…

• A. Neo-Darwinism
• B. Neo-Lamarckism
• C. Modem synthesis
• D. Neo Darwinism and Modern synthesis

Explanation: Neo-Darwinism is a term used to describe the synthesis of Charles Darwin's theory of evolution by natural selection with Gregor Mendel's…

• A. Aristotle
• B. Darwin
• C. Lamarck
• D. Lyell

Explanation: Chris Lyell was a great geologist of his time. His theory of uniformitarianism inspired Darwin.

• A. Becomes fast
• B. Remains same
• C. Slows Down
• D. None of these

Explanation: When resources become scarce, the population growth of a species tends to slow down or stabilize.

• A. A sterile mule that can pull Over 800 pounds
• B. A childless human male who lives to be over one hundred years old
• C. A dog who cannot give birth due to a hip abnormality, but is healthy in all other respects
• D. A prairie dog that, though smaller than the average member of her species, has twice as many healthy young in each litter

Explanation: Even though the prairie dog is smaller than the average member of her species, her smaller size does not appear to be a disadvantage in…

• A. Teeth of domestic dog, teeth of a wolf
• B. Wings of Geospiza magnirostris, wings of Geospiza fortis
• C. Wing of Hawkmoths, the wing of hawks
• D. All of these

Explanation: Bats, birds, and insects all have wings, but they evolved from different ancestors.

• A. Heritable
• B. Non-heritable
• C. Both A and B
• D. Acquired

Explanation: Natural selection can amplify or diminish only those variations that are heritable.