Question

6. A disease in which the causative organism is a protozoan and is spread by an insect:
a. tuberculosis b. jaundice
c. malaria
d. measles
7. Sanjeeda dug two pits, A and B, in her garden. In pit A, she packed some agricultural waste in a polyhtene bag and dumped it in the pit. In pit B, she dumped the same kind of waste but without packing it in a polythene bag. Then, she covered both the pits with soil. After a month, she observed that
a. Waste in both pits degraded almost equally.
b. Waste in pit B degraded faster than that in pit A.
c. Waste in pit A degraded faster than that in pit B.
d. Waste in both pits did not degrade at all.​

Answer 1

Answer:

Explanation:

1.the disease is spread by mosquitoes which is MALARIA.

its a protozoan disease.

it is caused beacuse of female anepholes mosquito.

>>these mostquitoes have their home in stagnant water and open drums with water.

>>they lay many eggs and the larva soon turns to mosquitoes.

>.when they bite, the malaria spreads.

>.if the same bitten mosquito bites the healthy person,he will be effected with malaria.

>.we must take many preventive measures like

.we must not leave water stagnated

spray kersone in stagnated areas.

..and also cover drums which contain water with caps..

2.sanjeeda dug 2 pits A and B .

agriculture waste in polythene bag in A

agriculture waste directly in B

so,waste in pit B degraded faster than pit A.

option b is right.

>>the waste decomposed fastly as organic materials decompose fastly.plastics take more time decompose/not decompose at all sometimes.