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  •  Which of the following statements are correct? Statement 1: Ontogeny repeats phylogeny, according to the biogenetic law established by Ernst Haeckel. <p d

 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. 

Option: 1

Statement 1 and 2 are correct but statement 3 and 4 are incorrect.


Option: 2

Statement 1 and 3 are correct but statement 2 and 4are incorrect.


Option: 3

Statement 1, 2 and 3 are correct but statement 4 is incorrect.


Option: 4

All the statements 1,2,3 and 4 are correct.


Answers (1)

best_answer

  • Ontogeny is an organism's life history, whereas phylogeny is the evolution of that organism's race.

  • The toad's tadpole larva is well known to us; it resembles the fish-like forebears of the amphibian class to which toads belong. 

  • There is a brief stage in which rudimentary and non-functional gill slits form for a limited period of time in both chick and human embryos.

  • The only way to account for the development of a fish-like stage with gill openings in the embryos of toads, chicks, and mammals is to assume that these organisms sprang from a fish-like ancestor stock.

  • Even though two animal species' adults may not resemble one another very much, their embryos often do. For instance, a chick in its early stages

  • Option 4 is the correct answer. 

Posted by

Ritika Harsh

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