What happens to the ovum, menstruation and ovulation after the fertilization of the ovum?

Solution

After fertilization:
(i) Ovum forms zygote which fixes itself into the wall of uterus and starts to develop as an embryo. The embryo tissues and mother’s uterus wall tissue form placenta which is the vital connection between foetus and the mother.
(ii) Menstruation and ovulation do not take place during pregnancy. However, they are resumed after the birth of the child.

Some More Questions From Our Environment Chapter

What is the importance of DNA copying in reproduction?

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Our Environment

What happens to the ovum, menstruation and ovulation after the fertilization of the ovum?

Some More Questions From Our Environment Chapter

What is the importance of DNA copying in reproduction?

Why is variation beneficial to the species but not necessarily for the individual?

Name the methods of asexual reproduction.

Name two organisms which reproduce by (a) budding (6) fragmentation and (c) spore formation.

Why cannot all multicellular organisms divide cell-by-cell like Spirogyra?

How is the problem of dobling of the amount of DNA solved ?

Write names of five plants in which stem is used to produce a new plant.

Give one example of plant which uses leaves for propagation. Draw propagation organ.

List four methods of vegetative propagation which are exploited by man in propagating plants in garden and nurseries.

Write five names of plants which are usually propagated by cutting method.

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