22. List the sources of noise pollution in your surroundings.
23. Define adolescence.
24. List changes in the body that take place at puberty.
25. Give two differences between a zygote and a foetus.
26. Why should we conserve biodiversity?
27. What is Red Data Book?
28. What are the major groups of microorganisms?
29. What is irrigation? Is
Answers
Answer:
22.List sources of noise pollution in your surroundings
Sounds of Vehicles.
Bursting of Crackers.
Loudspeakers at High Volume.
Kitchen Appliances (like Hand Mixer)
Electronic Appliances (like TV)
Barking of dogs.
23.the period of a person’s life between being a child and becoming an adult, between the ages of about 13 and 17.
24. Following changes take place in the body during puberty:
Increase in Height.
Change in Body Shape.
Voice Change.
Increased Activity of Sweat and Sebaceous Glands.
Development of Sex Organs.
Reaching Mental, Intellectual and Emotional Maturity
25.Zygote Foetus
Zygote is single celled Foetus is multicellular
Well defined body parts are absent in zygote In foetus, body parts can be identified.
Answer:
22. sound of vehicles
Explanation:
28 .viruse bacteria
