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Our Environment

Question

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Why are testes lodged in scrotum outside the body?

Solution

Scrotum provides 1–3°C lower temperature than body temperature. It is the optimum temperature for the formation of sperms in the testes.

Some More Questions From Our Environment Chapter

Is an offspring exactly similar to its parent? Why or why not?

How are variations important?

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.

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