Question

6. Differentiate between the following :

(a) Pollen tube and Style

(b) Fission in Amoeba and Plasmodium

(c) Fragmentation and Regeneration

Answer 1

when pollen grains germinate then they produces the pollen tube. this tube enters the ovary via style and enter in the ovule.

style is upper part of the flower through which pollen grains reach the ovary

Answer 2

a- When pollen grains deposited on the sigma of a flower, it generates pollen tube that penetrates inside the style and takes male gametes to the ovule whereas style is the elongated part of a carpel between the ovary and the stigma.

b- The difference between the process of binary fission in amoeba and paramecium is that:

- In amoeba, the binary fission begins with the division of nucleus

- In paramecium, the division of cell takes place simultaneously with the division of nucleus and cytoplasm.

c- The main difference between regeneration and fragmentation is that, regeneration is simply re-growth of a particulate missing part of a body whereas fragmentation specifies two parts growing into complete organisms.