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Our Environment

Question

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Why is DNA copying an essential part of the process of reproduction?

Solution

DNA copying is an important process that ensures that when cell multiplies, through the mechanisms of mitosis or meiosis, equal amount of DNA (genetic material) passes in to the new cell. DNA is copied so that the amount of DNA remains constant in the daughter cells.

Some More Questions From Our Environment Chapter

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.

Name a ornamental plant which is grown by the vegetaive propagation of stem.

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