3. What helps to bring pollen grains to the stigma?4 Describe the trac

1.	3. What helps to bring pollen grains to the stigma?4 Describe the tracheal system of cockroach.
Answer» Answer: It is carried out by cross-pollination by agents LIKE insects,wind and SOMETIMES even water. Firstly in few of the plants, the stigma is quite sticky and is wide OPEN in the case of wind pollination. ... THEREBY, the pollen grains get TRANSFERRED to stigma in cross and self pollination.

3. What helps to bring pollen grains to the stigma?4 Describe the tracheal system of cockroach.

Answer»

Answer:

It is carried out by cross-pollination by agents LIKE insects,wind and SOMETIMES even water.

Firstly in few of the plants, the stigma is quite sticky and is wide OPEN in the case of wind pollination. ...

THEREBY, the pollen grains get TRANSFERRED to stigma in cross and self pollination.