Class 11 Biology - Chapter Biological Classification NCERT Solutions | State two economically important uses of
State two economically important uses of: (a) Heterotrophic bacteria (b) Archaebacteria
(a) Heterotrophic bacteria
(1) Many bacteria like Lactobacillus helps in the production of curd from milk.
(2) They act as decomposers and help in the formation of humus e.g. Pseudomonas.
(3) Many antibiotics are obtained from some species of bacteria like streptomyces, Bacillus etc.
(4) Many soil bacteria help in fixation of atmospheric nitrogen like Rhizobium (Symbiotic), Azotobacter (Free living).
(b) Archaebacteria
(1) Methane gas is produced from the dung of ruminants by the methanogens.
(2) Methanogens are also involved in the formation of biogas and sewage treatment.
More Questions From Class 11 Biology - Chapter Biological Classification
- Q:- Describe briefly the four major groups of Protozoa.
- 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?
- Q:- Find out what do the terms algal bloom and red-tides signify.
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?
Recently Viewed Questions of Class 11 Biology
- Q:-
What are the steps involved in formation of a root nodule?
- Q:-
What is a mesosome in a prokaryotic cell? Mention the functions that it performs.
- Q:- How is a key helpful in the identification and classification of an organism?
- Q:-
How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?
- Q:-
What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
- Q:- Which hormone deficiency is responsible for the following?
(a) Diabetes mellitus
(b) Goitre
(c) Cretinism - Q:- Figure 13.10 shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions:
(a) At which point/s (A, B or C) in the curve is light a limiting factor?
(b) What could be the limiting factor/s in region A?
(c) What do C and D represent on the curve?
- Q:-
Match the following (a) Cristae (i) Flat membranous sacs in stroma (b) Cisternae (ii) Infoldings in mitochondria (c) Thylakoids (iii) Disc-shaped sacs in Golgi apparatus
- Q:- Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.
- Q:-
What are nuclear pores? State their function.
10 Comment(s) on this Question
Thanku for the study material
Thanku
Very use ful
I definitely liked entire lot that was written. I'd love to abide by reading more and more. I liking be happy to learn as much as I can I surely admire you an eye to the sequel so well done recognition you acutely much to save the time. Successfully!
Both points for archaebacteria are similar
HELPED ME , THANK YOU
Nice to me
Can you give us notes for every lessons of class 11 (cbse)?
Good But Stay main points and some points are confused us ......Nice job for Answers help Thanku
biology is limitless the more u try find the more u get confused ððð
- All Chapters Of Class 11 Biology
- All Subjects Of Class 11