Events in sexual reproduction

1-pre fertilization

2-fertilization

3-post fertilization

1-pre fertilization-two men pre fertilization events are-

Gametogenesis

Gamete transfer

1-gametogenesis-two gametes are present

a-male gamete

b-female gamete

* Gametes are haploid cell

. In some algae the two gametes are are so similar in appearance that is not possible to categorise them into male and female gametes hence they are called homogametes (isogametes) eg-cladophora

. The gametes produced Arif to morphologically distinct types are called  heterogametes eg-fucus, human

. Male gametes is  antherozoid or sperm

. Female eg- egg or ovum. 

Monera, enjoy, ki, bryophytes are haploid plant body (mitotic division)

Pteridophyte, gymnosperm, angiosperm, including human bing are diploid plant body (meiosis division)

Gamete transfer-

# in algae, bryophytes, pteridophytes water is medium

. In seed plants pollen grains are are the carrier of male gametes and ovul have egg

Self fertilizing plant is eg- peas. Pollen grains germinate on the stigma and the pollen tube carrying the male gametes reach the ovul and discharge male gametes near the egg