Which of the following is incorrect match?
Which of the following is incorrect match?
- A
Devonian period -Age of fishes
- B
Carboniferous period -Age of amphibians
- C
Ordovician period -Age of invertebrates
- D
Cretaceous period -Age of reptiles
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Which set includes only analogous organs?
Which set includes only analogous organs?
Common origin of man and chimpanzee is best shown by
Common origin of man and chimpanzee is best shown by
- [AIPMT 1997]
A substance (low molecular weight protein) produced by host cells in response to viral infection and protect other cells against further viral infection is
A substance (low molecular weight protein) produced by host cells in response to viral infection and protect other cells against further viral infection is
- [AIIMS 1982]
In the developmental history of mammalian heart, it is observed that it passes through a two-chambered fish-like heart, three-chambered frog-like heart and finally four-chambered stage. To which hypothesis can this above cited statement be approximated
In the developmental history of mammalian heart, it is observed that it passes through a two-chambered fish-like heart, three-chambered frog-like heart and finally four-chambered stage. To which hypothesis can this above cited statement be approximated
- [AIPMT 1998]
Replacement of original hard parts or even the soft tissues of the organisms by minerals is known as
Replacement of original hard parts or even the soft tissues of the organisms by minerals is known as