Organisms and Populations Quiz 3

World ozone day is celebrated on

A group of individuals belonging to the same species within an ecosystem is called a

The populations of different species that live and interact together in the ecosystem are called

If do not occur in an ecosystem, the survival of organisms may not take place and functioning of ecosystem is lost.

If in a pond there were 200 lotus plants last year and through reproduction 20 new plants are added, taking the current population to 220, what is the natality rate of the lotus for that year ?

During laboratory experiments, 30 fishes died from an aquarium tank having 150 fishes during one month. What is the rate of mortality of fishes per month ?

Which of the following is correct statement?

What is the apt definition of density?

On which of the following factors is growth rate of a population dependent ?

When pre-reproductive age group is large in a population, what will be the growth rate of that population?