| Which of the following statements are correct about an algal bloom? |
| 1. Algal blooms occur in freshwater. |
| 2. Algal blooms occur in marine environment. |
| 3. Algal blooms concentrations may reach millions of cells per mililitre |
| 4. Algal blooms are green in colour. |
| Select the correct answer using the codes given below. |
A) 1 and 3
B) 1 and 4
C) 1, 2 said 4
D) All of these
Correct Answer: D
Solution :
[d] Algal bloom is a rapid increase or accumulation in population of algae in an aquatic system. It occurs in fresh water as well as in marine environment. It occurs concentrations of hundreds to thousands of cells per mililitre they are green, but other colours also, depending or species of algae.
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