Class 11 Biology - Chapter Biological Classification NCERT Solutions | Find out what do the terms algal bloom a
Welcome to the NCERT Solutions for Class 11th Biology - Chapter Biological Classification. This page offers a step-by-step solution to the specific question from Exercise 1, Question 4: find out what do the terms algal bloom and red tid....
Question 4
Find out what do the terms algal bloom and red-tides signify.
Answer
Algal bloom refers to vigorous growth of algae or blue-green algae in water, due to enrichment of water body with minerals nutrients coming from fields, resulting in discoloration of the water body. This causes an increase in the biological oxygen demand (BOD), resulting in the death of fishes and other aquatic animals, due to suffocation.
More Questions From Class 11 Biology - Chapter Biological Classification
- Q:- Describe briefly the four major groups of Protozoa.
- Q:- State two economically important uses of: (a) Heterotrophic bacteria (b) Archaebacteria
- Q:- Discuss how classification systems have undergone several changes over a period of time?
- Q:- What are the characteristic features of Euglenoids?
- Q:- What do the terms phycobiont and mycobiont signify?
- Q:- Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases.
- Q:- Give a comparative account of the classes of Kingdom Fungi under the following:
(i) Mode of nutrition
(ii) Mode of reproduction - Q:- Plants are autotrophic. Can you think of some plants that are partially heterotrophic?
- Q:- What is the nature of cell-walls in diatoms?
- Q:-
How are viroids different from viruses?
Popular Questions of Class 11 Biology
- Q:- Why are living organisms classified?
- Q:- What is the basis of classification of algae?
- Q:- What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
- Q:- What is meant by modification of root? What type of modification of root is found in the (a) Banyan tree (b) Turnip (c) Mangrove trees
- Q:- State the location and function of different types of meristem.
- Q:- Answer in one word or one line. (i) Give the common name of Periplaneta americana. (ii) How many spermathecae are found in earthworm? (iii) What is the position of ovaries in the cockroach? (iv) How many segments are present in the abdomen of cockroach? (v) Where do you find malphigian tubules?
- Q:-
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell. - Q:- What are macromolecules? Give examples.
- Q:- What is the average cell cycle span for a mammalian cell?
- Q:- What are the factors affecting the rate of diffusion?
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- Q:- Answer in one word or one line. (i) Give the common name of Periplaneta americana. (ii) How many spermathecae are found in earthworm? (iii) What is the position of ovaries in the cockroach? (iv) How many segments are present in the abdomen of cockroach? (v) Where do you find malphigian tubules?
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Column I Column II
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(b) Hydrolysis of starch (ii) Bile
(c) Digestion of fat (iii)Lipases
(d)Salivary gland (iv) Amylases - Q:- Describe the important properties of enzymes.
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(a) atlas/axis
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10 Comment(s) on this Question
Joy
2019-10-08 08:41:29
Where is red tide
Alal uddin
2019-08-20 11:27:30
Thank you very much for given this questions answers
kakito
2019-06-05 20:09:38
Red tide is the common name of algal boom
Zoya Hasan
2019-06-02 12:23:20
Please explain about red tides
Kahish rajan
2019-05-20 19:43:21
What the termred tides signify
Thoom sandeep
2018-07-28 18:58:19
Sir red tides means
Akshika
2018-05-31 22:27:17
easy
Mohd suhail
2018-02-18 04:48:29
Samajh nhi Aaya
Gaurav mishra
2017-07-06 21:28:20
Not explanatin of red tides
Divya negi
2017-03-08 08:07:28
Not explain about red tides
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