AP BIOLOGY

ECOLOGY

HUMANS AND THE BIOSPHERE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
DDT is – ____, which means that it cannot be broken down by organisms.
A
toxic
B
non biodegradable
C
plastic
D
tough
Explanation: 

Detailed explanation-1: -DDT is harm to all biota of the planet as it is non-biodegradable, and tends to become more concentrated as it moves up the food chain. It is a fat-soluble chemical, and accumulates in the fat deposits of the body.

Detailed explanation-2: -DDT (Dichlorodiphenyltrichloroethane) is non-biodegradable pesticide i.e. it cannot be degraded by the action of microbes. It is a crystalline, colorless and odorless compound which was used extensively as an insecticide until its harmful environmental impacts were identified.

Detailed explanation-3: -It is a non-biodegradable substance because it cannot be decomposed by the micro-organisms and is capable of exerting its harmful effects on the environment. This is because till date there is no such enzyme has been found in any microbes that can degrade DDT.

Detailed explanation-4: -DDT is a non-biodegradable pollutant.

There is 1 question to complete.