Question

Study the four statements (a–d) given below and select two correct ones out of them:

1. A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers

2. Predator starfish Pisaster helps in maintaining species diversity of some invertebrates

3. Predators ultimately lead to the extinction of prey species


4. Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders

The two correct statements are

• A.
  2 and 3
• B.
  3 and 4
• C.
  1 and 4
• D.
  1 and 2

Answer 1

The correct option is D

1 and 2
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 of the north west coast of North America. This predatory starfish 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.
So, the correct option is D.