List of top Botany Questions on Reproduction in Organisms

Assertion (A): Organisms habitat, its internal physiology and other factors collectively responsible for how it reproduce
Reason (R): Reproduction enables the continuity of the species

Name the cells of mature pollen grain when you observe under microscope with the following characters respectively,
A) Bigger cell with abundant food reserve and large irregular shaped nucleus.
B) Small, dense cytoplasm with nucleus.

Fusion between two similar gametes, two dissimilar gametes, and non-motile and motile gametes occurs in these organisms respectively.