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Our Environment

Question

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Write two examples each of sexually transmitted diseases caused by (i) virus, (ii) bacteria. Explain how the transmission of such diseases be prevented?

Solution

Sexually transmitted diseases by virus- Warts and HIV-AIDS.
Sexually transmitted diseases by bacteria- Gonorrhoea and Syphilis.
The transmission of Sexually transmitted diseases can be prevented in the following ways:
• Using protection or condoms during sexual intercourse.
• Prohibiting the sharing of needles, syringes etc.
• Testing of blood before transfusion

Some More Questions From Our Environment Chapter

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.

What are the different types of asexual reproduction?

Describe the binary and multiple modes of asexual reproduction in organisms.

Explain budding, spore formation, regeneration and fragmentation modes of asexual reproduction.

What are the advantages of vegetative reproduction?

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