AIIMS Biology Organisms And Populations Class 12 Questions

Which is correctly labelled with respect to the given diagram?

Bacteria, fungi, lower plants survive in adverse conditions by

Monarch butterfly escapes from predators by

What is the Greek word for ecology?

Beta diversity is diversity

Which one of the following correctly represents an organism and its ecological niche?

Assertion : The age-sex structure of human population in countries like France and Germany gives a steep pyramid. Reason : In countries like Sudan and India the population is increasing at a rapid rate.

Assertion : Animals adopt different strategies to survive in hostile environment. Reason : Praying mantis is green in colour which merges with plant foliage.

Which one of the following is a matching pair of certain organism(s) and the kind of association?

Which one of the following pairs is correctly matched:

Assertion : Smaller the organism higher is the rate of metabolism per gram weight. Reason : The surface area is large as compared to the volume.

Assertion : All birds, except the ones like koel (cuckoo) build nests for retiring and taking rest during night time (day time for nocturnal) Reason : Koel lays its eggs in the nests of tailor bird.

The abundance of a species population within its habitat is called

Assertion : Death is regarded as the most important regulatory process on earth. Reason : It avoids over-crowding, caused by continuous reproduction.

Some students, during a study, caught, marked and released 80 fishes in a pond. Later 100 fishes were caught at random. Among these 40 were found to be marked. What is the approximate number of fishes in the pond?

Mutualism is found in