Free Lamarckism MCQs with Answers
15 Lamarckism MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Lamarckism explains evolution through environmental influence, use and disuse of organs, and the inheritance of acquired characteristics. It differs from Darwinian natural selection because Lamarck proposed that organisms develop useful traits during their lifetime and pass them on, a view not supported by modern genetics.
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- A. variations arise at random and are then selected
- B. characteristics acquired during an individual's lifetime are passed on to its offspring
- C. species are fixed and do not change
- D. populations evolve by chance changes in allele frequency
Explanation: Lamarck proposed that an organism changes during its own life in response to need and environment, and that these changes are transmitted…
Correct answer: characteristics acquired during an individual's lifetime are passed on to its offspring- A. giraffes with longer necks survived and left more offspring
- B. a mutation in a growth gene lengthened the neck
- C. chance alone lengthened necks in a small isolated population
- D. each generation stretched its neck to reach higher leaves and the gain was inherited
Explanation: In Lamarck's account the effort of stretching lengthens the neck within the animal's own lifetime and the longer neck is then handed to…
Correct answer: each generation stretched its neck to reach higher leaves and the gain was inherited- A. changes in body cells do not alter the genes carried in the germ cells
- B. organisms were found not to vary at all
- C. the fossil record showed no change over time
- D. no organ was ever found to degenerate through disuse
Explanation: Weismann's germ plasm idea, supported by his experiment of cutting off the tails of mice for many generations without shortening the tails…
Correct answer: changes in body cells do not alter the genes carried in the germ cells- A. an organ that is constantly used becomes better developed while a disused organ degenerates
- B. all organs of the body remain unchanged throughout life
- C. organs change only when their genes mutate
- D. an organ once lost can never reappear in any descendant
Explanation: This is the first of Lamarck's two laws, and he used it to explain the strong limbs of a blacksmith, the webbed feet of water birds and…
Correct answer: an organ that is constantly used becomes better developed while a disused organ degenerates- A. Lamarck
- B. Darwin
- C. Mendel
- D. Wallace
Explanation: Charles Darwin proposed the theory of natural selection in 'On the Origin of Species' (1859).
Correct answer: Darwin- A. Darwin and Mendel
- B. Lamarck and Darwin
- C. Mendel and Morgan
- D. Watson and Crick
Explanation: The modern evolutionary synthesis combines Darwin's natural selection with Mendelian genetics and population genetics.
Correct answer: Darwin and Mendel- A. Traits caused by mutation
- B. Traits inherited from parents
- C. Traits developed by use or disuse
- D. Traits selected by nature
Explanation: Lamarck held that an organ strengthens with use and withers with disuse during an individual's own lifetime, and that this change is then…
Correct answer: Traits developed by use or disuse- A. Natural selection
- B. Genetic mutation
- C. Survival of the fittest
- D. Stretching of necks over generations
Explanation: In Lamarck's account each giraffe stretched to reach higher leaves, its neck lengthened a little during its own life, and that gain was…
Correct answer: Stretching of necks over generations- A. Natural selection
- B. The theory of recapitulation
- C. Inheritance of acquired characters
- D. Over production
Explanation: Lamarck proposed that organisms acquire adaptations through use and disuse and pass those acquired characters to their offspring.
Correct answer: Inheritance of acquired characters- A. Cytoplasmic composition of somatic cells
- B. Cytoplasmic composition of germ cells
- C. DNA of somatic cells
- D. DNA of germ cells
Explanation: The correct answer is Option D:DNA of germ cells.Acquired characteristics are changes in an organism's structure or behavior that occur…
Correct answer: DNA of germ cells11. The present giraffe has a long neck compared to its ancestors, Lamarck believed it could be due to
- A. Natural selection
- B. Inheritance of acquired characteristics
- C. Isolation
- D. Specification
Explanation: The inheritance of acquired characteristics is a theory that physiological changes acquired during an organism's lifetime can be passed…
Correct answer: Inheritance of acquired characteristics- A. Overproduction
- B. Struggle for existence
- C. Natural selection
- D. Use and disuse of organs
Explanation: According to Lamarckism, the organs which are used extensively develop themselves in a better way and the organs which are not used, lose…
Correct answer: Use and disuse of organs- A. thick subcutaneous fat in their palms
- B. greater quantity of melanin all over the body.
- C. strong calf muscles
- D. certain aquired characters
Explanation: Lamark argued that those parts of the body used extensively to cope with the environment become larger and stronger example; black Smith…
Correct answer: certain aquired characters- A. i only
- B. i, ii & iii
- C. i & iv
- D. ii, iii & v
- E. i, ii, iii & v
Explanation: Explanation for this question will be added soon.
Correct answer: ii, iii & v- A. Lamarck
- B. Darwin
- C. Weismann
- D. De Vries
Explanation: Lamarckism is a theory of evolution based on the principle that physical changes in organisms during their lifetime.
Correct answer: LamarckLamarckism MCQs: common questions
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