Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Study the four statements given below and select the two correct ones out of them. (1) A lion eating a deer and sparrow feeding on grain are ecologically similar in being consumers (2) Predator star fish 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 disordersA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: B
Solution :
Both lion (carnivore) and sparrow (herbivore) are consumers. The Asteroidea occupy several important roles throughout ecology and biology. Sea stars, such as Ochre star (Pisaster ochraceus) have became widely known as the example of the keystone species concept in ecology. Most species are generalist predators, eating molluscs such as clams, oysters, etc.
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