Which of the following statements is true?

  • A
    Stem cells are specialized types of cells.
  • B
    There is no evidence of gill slits during mammalian embryogenesis.
  • C
    All plant and animal cells are totipotent.
  • D
    Ontogeny recapitulates phylogeny.

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Similar Questions

The cause of aging in mammals,including humans,is:

Match the following columns:
List-$I$ List-$II$
$(W)$ Placental mammals and Australian marsupials $(i)$ Adaptive radiation
$(X)$ Darwin's finches $(ii)$ Convergent evolution
$(Y)$ Giraffe $(iii)$ Divergent evolution
$(Z)$ Forelimbs of whale and bat $(iv)$ Lamarckism

$A$ species that is produced by the loss or disappearance of a few characters found in its parents is termed as:

Which of the following refer to incorrect example$(s)$ of organisms which have evolved due to changes in environment brought about by anthropogenic action?
$(a)$ Darwin's Finches of Galapagos islands.
$(b)$ Herbicide resistant weeds.
$(c)$ Drug resistant eukaryotes.
$(d)$ Homologous organ in Bat and Man

What type of evolution is shown in the figure?

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