What are the two parts of pollen sac?
Important Questions on Reproduction in Lower and Higher Plants
Assertion Xenogamy involves transfer of pollen grains from the flower of one plant to the stigma of another plant.
Reason This is the only type of pollination which brings genetically different types of pollen grains to the stigma.
The correct answer is:
Match the following lists:
| List I | List II |
| A) Epidermis | I) Thin walled cells |
| B) Tapetum | II) One celled thick |
| C) Endothecium | III) Inner most layer |
| D) Stomium | IV) Fibrous thickening |
| V) Meiosis |
The correct match is:
Assertion Pollengrains are well preserved as fossils
Reason The exine of pollen grains is made up of sporopollenin, which can withstand high temperatures, strong acids and alkali.
A- Endothecium
B- Tapetum
C- Epidermis
D- Middle Layer
Observe the diagram of the young anther given below:
Which layer nourishes the developing pollen grain.
Assertion (A): In some plants the generative cell divides and forms the two male gametes during pollen tube growth in stigma.
Reason(R): In plants which shed pollen in three cell stage, the pollen tube will have two male gametes from the beginning.
The correct option among the following is:
