Home
Class 11
BIOLOGY
Polluted water bodies have usually very ...

Polluted water bodies have usually very high abundance of plants like Nostoc and Oscillitroia. Give reasons.

Text Solution

Verified by Experts

Polluted water bodies possess high algal growth due to the presence of nutrient. These nutrient increase the rapid growth of water plants, i.e., algae especially Nostoc and Oscillitoria, etc, and result in colonies. These colonies are generally surrounded by a gelationous sheath and furtherleads to the formation of blooms in water bodies.
Promotional Banner

Topper's Solved these Questions

  • BIOLOGICAL CLASSIFICATION

    NCERT EXEMPLAR ENGLISH|Exercise Short answer|7 Videos

  • BIOLOGICAL CLASSIFICATION

    NCERT EXEMPLAR ENGLISH|Exercise Long answer|5 Videos

  • BIOLOGICAL CLASSIFICATION

    NCERT EXEMPLAR ENGLISH|Exercise Long answer|5 Videos

  • ANIMAL KINGDOM

    NCERT EXEMPLAR ENGLISH|Exercise LONG ANSWER TYPE QUESTIONS|4 Videos

  • BIOMOLECULES

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer Type Questions|5 Videos

Similar Questions

Explore conceptually related problems

A well watered potted herbaceous plant shows wilting in the afternoon of a dry sunny day. Give reason.

Does a body moving around a circular path with constant speed have constant velocity? Give reasons.

High biological oxygen demand in a water body means ………. (a) water is not polluted (b) water is less polluted (c) water body contains lots of life forms and organic pollutant. (d) None of the above

Water plants usually have well developed

Give reason for the following: (i) Electric bulbs are usually filled with chemically inactive gases like nitrogen and argon. (ii) Copper and aluminium wires are usually employed for electricity transmission. (iii) Fuse wire is placed in series with the device.

Plants growing near sea shore will usually have xerophyic characters, like thick leaves because

In a village in Karnatka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the waterbody was completely covered with green floating plants and fishes started dying in large numbers. Analyse the situation and give reasons for excessive growth of plants and death of fish in the lake.

In both water and dimethyl ether (CH_(3)-underset(* *)overset(* *)O-CH_(3)), oxygen atom is central atom, and has the same hybridisation, yet they have different bond angles. Which one has greater bond angle ? Give reason.

In both water and dimethyl ether (CH_(3)-underset(..)overset(..)O-CH_(3)) , oxygen atoms is central atom, and has the same hybridisation, yet they have different bond angles. Which one has greater bond angle? Give reason.

A farmer observed drops of water along the margins of leaves of tomato plants growing in his well irrigated field on a winter morning. Give reasons for this occurrence. Why the water drops appeared only along the leaf margins?