1. Differentiate between:
a. Zygote and Foetus
b. Internal and external fertilisation
Answers
Explanation:
Zygote is the early stage of foetus.
Formed by the fusion of male and female gametes.
Duration: It is observed between 1-4 months.
Foetus is the developed zygote.
Forms after the development of embryo.
Foetus is also be called as the well developed BABY.
Duration: It is observed in 9 months
Internal fertilisation:
It takes internally .
The mode of reproduction is sexual reproduction.
External fertilisation:
It takes place externally.
The mode of reproduction is asexual.
Answer:
a) The zygote is the initial stage in baby development. It is also known as a fertilized ovum formed from the union of the sperm cell and the egg cell. Foetus refers to the final stage in baby development. An embryo is termed as the foetus in the beginning in the 11th week of pregnancy.
b) Internal fertilization is the process when the syngamy (union of male and female gamete) occurs inside the female body after insemination using copulation. In contrast, External fertilization is the syngamy outside the female body, that is in the outer environment especially in water bodies.
Explanation:
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