MCQ
Respiratory enzymes are located in
- ✓Mitochondrial matrix (mitochondria)
- BPerimitochondrial space
- CCristae
- DOuter membrane
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- Chromosomes are fully condensed.
- by the end of this stage, the nucleolus disappear.
Identify this stage.
| Column $I$ | Column $II$ |
| $(A)$ Limbless reptile | $(i)$ Lamprey |
| $ (B)$ Jawless vertebrate | $(ii)$ Salamander |
| $ (C)$ Amphibian | $(iii)$ Snake |
| $(D)$ Cartilaginous fish | $(iv)$ Shark |
| $ (E)$ Flightless bird | $(v)$ Ostrich |
Match items in column I with those give in column II
Assertion $A:$ In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.
Reason $R$ : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statements, choose the correct answer from the options given below :