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Evidence of Embryology MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
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12 Questions around this concept.
Solve by difficulty
Which of the following statements are correct?
Statement 1: Unborn or unhatched organisms that are in the early stages of development are called embryos.
Statement 2: The growth and development of embryos happens in stages. The physical characteristics of an embryo change during its growth. Some features become more focused. Some features vanish.
Statement 3: In general, the early stages of development in related species' embryos share more characteristics than the later stages.
Statement 4: There may be similarities between the embryos of different species that are not apparent when the organisms are completely developed. Numerous of these resemblances are homologous traits. These characteristics demonstrate the species' evolutionary relationships.
Which of the following statements are correct?
Statement 1: Ontogeny repeats phylogeny, according to the biogenetic law established by Ernst Haeckel.
Statement 2: Ontogeny is an organism's life history, whereas phylogeny is the evolution of that organism's race.
Statement 3: Studying an individual plant or animal's developmental history provides strong support for the hypothesis of evolution.
Statement 4: Even though two animal species' adults may not resemble one another very much, their embryos often do.
In the following questions, a statement of assertion (A) is followed by a statement of reason (R)
(1) If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark A
(2) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark B
(3) If Assertion is true statement but Reason is false, then mark C
(4) If both Assertion and Reason are false statements, then mark D
Assertion: Even though two animal species' adults may not resemble one another very much, their embryos often do.
Reason: For instance, young chicks and young rabbits are nearly indistinguishable from one another, yet adults may be easily told apart.
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Concepts Covered - 1
Embryological Evidence
- Study of the developmental history of any individual plant or animal is convincing evidence in favor of the evolution theory.
- Every organism during its own development repeats the evolutionary history of its ancestors.
- Ernst Haeckel provided for biogenetic law stating that ontogeny repeats phylogeny.
- Ontogeny is the life history of an organism while phylogeny is the evolutionary history of the race of that organism.
- We are familiar with the tadpole larva of the toad which resembles the fish-like ancestors of the class amphibia to which toad belongs.
- Even in chick and human embryos, there is a brief stage in which rudimentary and non-functional gill slits appear for a short time.
- The occurrence of a fish-like stage with gill slits in the toad, chick, and mammalian embryos can only be explained on the ground that they have descended from a fish-like ancestral stock.
- The adults of two species of animals may resemble each other very little, but their embryos may do so very strongly. For example, early stages of chick and rabbit are almost indistinguishable, whereas the adults are easily distinguished from each other.
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