SELECT * FROM question_mgmt as q WHERE id=12 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=7 AND chapterId=4 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 11th biology Biological Classification discuss how classification systems have undergone

Question: Discuss how classification systems have undergone several changes over a period of time?

Answer:

The classification systems have undergone several changes with time. The first attempt of classification was made by Aristotle. He classified plants as herbs, shrubs, and trees. Animals, on the other hand, were classified on the basis of presence or absence of red blood cells. This system of classification failed to classify all the known organisms.

Therefore, Linnaeus gave a two kingdom system of classification. It consists of kingdom Plantae and kingdom Animalia. However, this system did not differentiate between unicellular and multicellular organisms and between eukaryotes and prokaryotes. Therefore, there were large numbers of organisms that could not be classified under the two kingdoms.

So Ernest Haeckel then separated unicellular eukaryotic organisms into separate kingdom named Protista and hence gave three kingdom classification.

After that Copeland,separated all prokaryotic organisms into a separate kingdom named Monera and hence Four-Kingdom systems of classification came into existence.

And lastly, a five kingdom system of classification was proposed by R.H. Whittakaer in 1969 to separate achlorophyllous,decomposer organism into a separate kingdom named Fungi. So five kingdoms are now

1) Monera

2) Protista

3) Fungi

4) Plantae

5) Animalia


< Previous Question

Next Question >

SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='2' AND subId='7' AND ex_no!=0 AND status=1 and id!=12 ORDER BY views desc, last_viewed_on desc limit 0,10

  • Popular questions of class 11 Biology

SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='2' AND subId='7' AND ex_no!=0 AND status=1 and id!=12 ORDER BY last_viewed_on desc limit 0,10

  • Recently Viewed Questions of Class 11 Biology

Comments

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

Comment(s) on this Question


NCERT Solutions

Quick Links

Resources

Support