ECOLOGY
HUMANS AND THE BIOSPHERE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Hawk
|
|
|
Rabbit
|
|
|
Frog
|
|
|
Grasses
|
Detailed explanation-1: -The organisms at the higher trophic level will have more concentration of the compounds. Here, fishes are at the highest trophic level, so they will accumulate maximum amount of pesticides. So, the correct answer is ‘Fishes’.
Detailed explanation-2: -The correct option is C Snake The concentration of DDT has increased alarmingly in organisms today. But the highest concentration of DDT is seen in the tertiary consumers.
Detailed explanation-3: -Biomagnification, also known as bioamplification or biological magnification, is the increase in concentration of a substance, e.g a pesticide, in the tissues of organisms at successively higher levels in a food chain.
Detailed explanation-4: -c) Carnivores are more affected by biomagnification because concentration of substances increases as you move up the trophic levels. Organisms higher on the food chain eat more than the lower ones, therefore receiving higher concentration of harmful substances.