| Pollination | Fertilization |
|---|---|
| 1. Definition. It is transfer of pollen grains from anther to the stigma of a flower. | It is the fusion of male and female gametes. |
| 2. Step. Pollination precedes fertilization. | Fertilization occurs only after pollination when the pollen grain has germinated and male gametes are carried into ovule. |
| 3. Purpose. It carries the male gamete producing pollen grains to the female sex organ | It actually brings about fusion of gametes |
| 4. Process. Pollination is a physical process | Fertilization is a physico-chemical (biological) process. |
| 5. Occurrence. It occurs only in seed plants | It occurs in both plants and animals of various types |
Maintenance of Posture and Equilibrium. Cerebellum. (a) Distinguish between voluntary and involuntary actions of our body. (b) Choose involuntary actions, amongst the following: Reading, Beating of heart, Salivation in the mouth on viewing tasty food, Talking.
Updated 1/20/2026
For two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below: a. Both A and R are true, and R is correct explanation of the assertion. b. Both A and R are true, but R is not the correct explanation of the assertion. c. A is true but R is false. d. A is false but R is true. Assertion: ln grasshoppers, females are hetero gametic and males are homo gametic. Reason: ln grasshoppers, male has only one sex chromosome (XO) whereas the female has sex chromosomes (XX).
Updated 1/20/2026
What is reproduction? What are the two types? Which one of the two confers new characteristics on the offspring and how?
Updated 1/20/2026
In terms of evolution, what is the significance of homology between a human hand and a wing of a bird?
Updated 1/20/2026
“The maximum concentration of harmful chemicals accumulates in human beings?” State the phenomenon involved and justify this statement.
Updated 1/20/2026
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