Multiple choice

Directions: The following items consist of two statements, one labelled as Assertion (A) and the other labelled as Reason (R). You are to examine these two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so, whether the reason is a correct explanation of the Assertion. Select your answer to these items using the codes given below. Assertion (A) : In oligotrophic lakes, high concentration of nutrients result in algae blooms. Reason (R) : A higher concentration of nutrients result in higher organic productivity.

  1. Both A and R are true and R is the correct explanation of A.

  2. Both A and R are correct but R is not the correct explanation of A.

  3. A is true but R is false.

  4. A is false but R is true.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oligotrophic lakes are actually nutrient poor, so the assertion that high nutrient concentrations cause algae blooms in oligotrophic lakes is false. However, the reason is true because higher nutrient concentrations generally lead to higher organic productivity in aquatic systems.

Keep practicing — related questions