Home
Class 12
BIOLOGY
Assertion: Presence of large amounts of ...

Assertion: Presence of large amounts of nutrients in water body causes excessive growth of planktonic algae.
Reason : It is due to biomagnifications

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
C
Presence of large amounts of nutrients in water causes excessive growth of planktonic (free- floating) algae, called an algal bloom which imparts a distinct colour to the water bodies. Algal blooms cause ddeterioration of the water quality and fish mortality. Biomagnification refcrs to increase in concentration of the toxicant at successive trophie levels.
Promotional Banner

Similar Questions

Explore conceptually related problems

Presence of large amount of nutrients in waters causes excessive growth of planktonic algae called

Read the following statements carefully and find the incorrect statements: A. More than 1 percent impurities make domestic sewage unfit for human use. B. Less BOD causes mortality of fish and other aquatic creatures. C. Presence of large amounts of nutrients in water also causes excessive growth of planktonic algae, called an algal bloom. D. Algai bloom causes deterioration of the water quality an decreases fish mortality. E. Some bloom-forming algae are extremely toxic to human beings and animals. F. Eichhornia crassipies is the world's most problematic aquatic weed.

Nutrient enrichment of water bodies causes

The presence of large amount of nitrogen in the atmosphere is due to:

Excessive amount of "____" in the body causes gout.

In water bodies, excessive amount of chemicals cause increased growth of:

Excessive nutrients in a fresh water body cause fish mortality give two reasons .

Excessive growth of planktonic algae due to presence of large amounts of nutrients in water causing a distinct colouration of water is known as

The condition caused due to release of large amounts of histamine is