Question

b) Give three differences between self pollination and cross pollination. [3] c) Name the following: [2] i) Largest cell ii) Smallest cell iii) Longest cell iv) Amoeboid cell in human beings

Answer 1

Answer:

b)Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.

c) iThe largest cells is an egg cell of ostrich. The longest cell is the nerve cell. The largest cell in the human body is female ovum. Smallest cell in the human body is male gametes, that is, sperm.

iiThe smallest cell is Mycoplasma (PPLO-Pleuro pneumonia like organims). It is about 10 micrometer in size.

iii The longest cell is the nerve cell.

ivAll white blood cells are known as an amoeboid cell in human beings. ... They enclose the cellular debris and bacteria by the similar method as amoeba takes up its food particles

Explanation:

Hopefully it will help you

Answer 2

Answer:

Differences between self pollination and cross pollination

SELF-POLLINATION  

1) The process of transferring the pollen grains from the anther to the stigma of the same flower or the stigma of a flower on the same plant is called self-pollination.  

2) It occurs in genetically same plants.

3) No external pollinating agents are required.

4) Eg- Orchids.

CROSS-POLLINATION  

1) The process by which the pollen grains are transferred from the anther of a flower to the stigma of another flower of the same species is called cross-pollination.

2) It occurs in genetically different plants of the same species.

3) External pollinating agents are required for this type of pollination (water, wind, insects etc).

4) Eg- Papaya.