Pleas help!! 1. What is germination?
2.What is Fertilization?
3. What is a pollen grain?

1A:Germination is the process by which an organism grows from a seed or similar structure.

2A:Flowering plants generate pollen, ovules, seeds, and fruit. Fertilization in flowering plants happens through a process called pollination. ... Fertilization occurs when one of the sperm cells fuses with the egg inside of an ovule. After fertilization occurs, each ovule develops into a seed.

3A:pollen grain is a minute body, of varying shape and structure, formed in the male structures of seed-bearing plants and transported by various means (wind, water, insects, etc.) to the female structures, where fertilization occurs. ... A pollen grain itself is not the male gamete.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.