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CBSE 11th Standard Biology Subject The Living World Ncert Exemplar 2 Marks Questions 2021

Published on: 27/05/2021

QB365 Provides the NCERT Exemplar Question Papers for Class 11 Biology , and also provide the detail solution for each and every ncert exemplar papers. Ncert Exemplar papers will help to get more idea about question pattern in every exams and also will help to get more marks in Exams

Download CBSE Class 11th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Biology

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Std: 11th Standard CBSE - Biology

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Questions:

Generic 2

5 x 2 = 10

Brinjal and potato belong to the same genus Solanum, but two different species. What defines them as separate species?

In a given habitat we have 20 plant species and 20 animal species. Should we call it as 'diversity' or 'biodiversity'? Justify your answer.

The number and kinds of organisms are not constant. How do you explain this statement ?

Properties of cell organelles are not always found in the molecular constituents of cell organelles. Justify.

A ball of snow when rolled over snow increases in mass, volume and size. Is this comparable to growth as seen in living organisms?why?

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Answers Key:

Generic 2

5 x 2 = 10

Brinjal and potato both belong to same genus as they share some common correlated characters.
They belong to different species because they have
(i) different morphological features
(ii) reproductive isolation (inability to interbreed).

We should call it biodiversity or biological diversity as it shows variety of living organisms present on earth.

The number and kinds of organisms are never constant at a place, as development and reproduction keep the number changing. This is influenced by season and availability of resources, e.g., number of mosquitoes is very large in warm and humid weather, whereas in extreme summer or winter, they can be seen rarely.

The organisation in a living body produces a new functional entity, which has its own properties not found in its components. Hence, a cell organelle is the one having its own properties not found in its molecular constituents.

No, this is not growth, as increase in size of ball of snow is just because of the addition of similar material externally.
In living organisms, growth is due to increase in body material from inside.