Tag: sexual reproduction in organisms

1)fertilization starts with fusion of male gamete (sperm) and female gamete (zygote). 
2) this fusion results in the formation of zygote. 
3) Zygote divided repeatedly to give rise ball of cells that forms embryo.
4) after the formation of embryo is gets embedded in the wall of uterus where it further forms the foetus so the correct order is in above steps.

Chlorophyceae is a class of algae that is also known as green algae commonly. Different members of this class reproduce differently.

The phenomenon of fertilization was first perceived by the German biologist Oscar Hertwig in sea urchin eggs in 1876. Hertwig observed that the sperm nuclei and egg fused during fertilization resulting in the generation of new organism. Thus the correct answer is option D.

Chlamydomonas reproduces both asexually and sexually. 

Fertilization is the process of fusion of male and female gametes. Gametes are haploid (n) in nature and the fusion of the two results in the diploid (2n) product called as zygote. Zygote is the universal diploid cell. 

Oogamous reproduction involves fusion of one motile male gamete and another non-motile large sized female gametes. 

Oogamy is a form of sexual reproduction. It is a form of anisogamy (heterogamy) in which the female gamete is significantly larger than the male gamete and is non-motile.The male gametes are  smaller in size and motile 
So, the correct option is 'Large non-motile female gamete and small motile male gamete'.

Syngamy and triple fusion are two events of sexual reproduction in plants. Syngamy is the fusion of one of the male gamete with the egg cell to produce a zygote while In triple fusion, second male gamete fuses with two polar nuclei to produce primary endosperm nucleus.

Fasciola is a genus of trematodes. It is commonly known as liver fluke. It shows the phenomena of endogamy where the two fusing gametes are derived from the same parent which means the gametes are uniparental. These are hermaphrodite and has both male and female reproductive organs. The male and female reproductive organs open up into the same chamber within the body, which is called the genital atrium where the two gametes fuses.

The process of fusion between the haploid male nucleus and egg nucleus is known as amphimixis. It is also known as syngamy. It leads to the formation of a diploid zygote. The form of sexual reproduction in which the gametes are of the same size and structure as the somatic cells. Trichonympha lives in the intestine termite species and helps them to break the cellulose which they take from the wood. They produce similar haploid gametes known as zooflagellates so it is classified as hologamy.