Class 11 Biology - Chapter The Living World NCERT Solutions | Why are the classification systems chang
Why are the classification systems changing every now and then?
Millions of plants, animals, and microorganisms found on earth, have been identified by the scientists while many new species are still being discovered around the world. Therefore, to classify these newly discovered species, with new characters, new systems of classification have to be devised every now and then. This creates the requirement to change the existing systems of classification.
More Questions From Class 11 Biology - Chapter The Living World
- Q:- Why are living organisms classified?
- Q:-
Define a taxon. Give some examples of taxa at different hierarchical levels.
- Q:- Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.
- Q:- How is a key helpful in the identification and classification of an organism?
- Q:- Define and understand the following terms:
(i) Phylum
(ii) Class
(iii) Family
(iv) Order
(v) Genus - Q:- Can you identify the correct sequence of taxonomical categories?
(a) Species → Order → Phylum → Kingdom
(b) Genus → Species → Order → Kingdom
(c) Species → Genus → Order → Phylum - Q:- What do we learn from identification of individuals and populations?
- Q:- Given below is the scientific name of Mango. Identify the correctly written name. Mangifera Indica Mangifera indica
- Q:- What different criteria would you choose to classify people that you meet often?
- Q:- Try to collect all the currently accepted meanings for the word species. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand and bacteria on the other hand.
Popular Questions of Class 11 Biology
- Q:- Discuss how classification systems have undergone several changes over a period of time?
- 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:-
Which of the following is correct:
(a) Cells of all living organisms have a nucleus.
(b) Both animal and plant cells have a well defined cell wall.
(c) In prokaryotes, there are no membrane bound organelles.
(d) Cells are formed de novo from abiotic materials. - Q:- Mention the function of the following
(a) Ureters in frog
(b) Malpighian tubules
(c) Body wall in earthworm - Q:-
Write short notes on the functions of the following hormones,
(a) Parathyroid hormone (PTH)
(b) Thyroid hormones
(c) Thymosins
(d) Androgens
(e) Estrogens
(f) Insulin and Glucagon - Q:- Define RQ. What is its value for fats?
- Q:- Discuss the factors responsible for ascent of xylem sap in plants.
- Q:-
What is meant by the term osmoregulation?
- 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:- Why are xylem and phloem called complex tissues?
- Q:- Both gymnosperms and angiosperms bear seeds, then why are they classified separately?
- Q:- What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.
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