Question

Study the four statements (a-d) given below and select the two correct ones out of them.
(a) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers.
(b) Predator star fish, Pisaster helps in maintaining species diversity of some invertebrates.
(c) Predators ultimately lead to the extinction of prey species.
(d) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders.
The two correct statements are

• A. (a) and (b)
• B. (b) and (c)
• C. (c) and (d)
• D. (a) and (d)

Answer 1

Answer: (A)

The correct option is A (a) and (b)
A lion eating a deer and a sparrow feeding on grain are ecologically similar being consumers is correct statement as both receive energy by consuming other organisms.

The starfish Pisaster is a keystone species in the rocky marine intertidal communities off the north west coast of North America. This predatory starfish feeds on the mussel Mytilus californianus and is responsible for maintaining much of the local diversity of species within certain communities.

Predators ultimately lead to the extinction of prey species is incorrect statement as predators does not leads to extinction, it actually maintains the equilibrium in ecosystem.

Production of chemicals such as nicotine, strychnine by the plants are not metabolic disorders.

Thus, only a and b statements are correct.

Therefore, the correct answer is option A.