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Our Environment

Question

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What is a seed? What does it contain?

Solution

Seed: A seed is formed from ovules after fertilization. The fertilized zygote divides and gives rise to embryo. Thus a seed contains a tiny plant or embryo. The embryo contains a tiny root called radicle, a small shoot called plumule and one or two cotyledons. The cotyledons contain food reserves.

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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