Q4 of 48 Page 1

Mention the two functions of human testis.

The two functions of human Testis are:


These are the main reproductive part in male reproductive system and the formation of germ-cells or sperms takes place in testis. These are located outside at the abdominal cavity in Scrotum due to low temperature requirement than the body temperature for the sperm formation. These are responsible for secretion of hormone known as testosterone.


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2

List any two factors that could lead to speciation.

 3

Mention one negative effect of our affluent life style on the environment.

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Every one of us can do something to reduce our consumption of various natural resources. List four such activities based on 3-R approach.

 8

Name the oxidising agent used for the conversion of ethanol to ethanoic acid. Distinguish between ethanol and ethanoic acid on the basis of (i) litmus test, (ii) reaction with sodium carbonate.