Question 1

Increase in body mass can be considered a criterion for growth in

Accepted Answer

(c) In both living and non-living beings, increase in body mass can be considered as a criterion for growth.It may occur as the result of accumulation of material on non-living surface or weight increase in livings organisms, e.g. mountains and sand dunes increase due to the accumulation of material on their surface.

Question 2

Choose an appropriate option to complete the given statement. In plants, growth takes place by .... throughout their lifespan.

Accepted Answer

(c) In plants, growth takes place by cell division or multiplication continuously in all parts throughout their lifespan.

Question 3

Growth in unicellular organisms can be observed by

Accepted Answer

(d) Growth occurs in unicellular organisms by cell division. It can be observed in in-vitro culture by counting the number of cells under the microscope.

Question 4

In most of the higher animals and plants, reproduction and growth are

Accepted Answer

(b) In most of the higher organisms like plants and animals, reproduction and growth are mutually exclusive events because increase in the body size of living beings does not alter the rate of reproduction or vice-versa.

Question 5

What kind of growth is exhibited by non-living organisms?

Accepted Answer

(a) Non-living objects like mountains, boulders and sand mounds grow by accumulation of material on their surface. However, in living organisms, growth is from inside (i.e. cell division in the body).

Question 6

Match the following columns:

Accepted Answer

A-4, B-2, C-5, D-3, E-1Planaria - True regenerationFungi - Asexual sporesSpirogyra - FragmentationHydra - BuddingAmoeba - Binary fission

Question 7

Which of the following characteristics is not a defining character of living organisms?

Accepted Answer

(b) Both growth and reproduction are not the defining characteristics of living organisms. Growth is exhibited by non-living matter in terms of increase in mass due to the accumulation of material. Similarly, reproduction is not exhibited by all living organisms and is not essential for the survival of an individual.

Question 8

Metabolism can be best defined as

Accepted Answer

(c) Metabolism refers the sum total of all the metabolic activities or chemical reactions in a body, i.e. anabolism and catabolism.
Anabolism is a constructive process, while catabolism is a destructive process.

Question 9

Consciousness is the defining property of living organisms because

Accepted Answer

(d) Consciousness is the defining property of living organisms because all living organisms show response to external or internal stimuli. For example, photoperiod affects breeding in plants and animals. Plants respond to external factors like light, water, temperature, pollutants, etc. Human being is aware of himself, i.e. show self-consciousness.

Question 10

Higher level of organisation emerges from interactions among organelles.

Accepted Answer

(a) True

Question 11

Which of the following statements are correct regarding the response of living beings to any external stimuli? I. All organisms from most simple to the most complex, sense and respond to the external stimuli. II. The external stimuli can be physical, chemical or a biological entity. III. Responding to an external stimulus is the characteristic feature of living beings. IV. Living organisms are self-replicating, evolving and self-regulating interactive systems capable of responding to external stimuli.

Accepted Answer

(d) I, II, III and IV

Question 12

Biodiversity can be best defined as

Accepted Answer

(a) Biodiversity refers to the variability of life on earth and it represents the number and type of organisms present on the earth.

Question 13

Standardising the name of living organism is known as

Accepted Answer

(c) Nomenclature is the process of standardising the name of living organisms such that a particular organism is known by same name all over the world.

Question 14

ICBN stands for

Accepted Answer

(b) ICBN stands for International Code for Botanical Nomenclature.

Question 15

The binomial nomenclature system was given by

Accepted Answer

(b) Carolus Linnaeus

Question 16

Which of the following is against the rules of ICBN?

Accepted Answer

(d) Option (d) is against the rules of ICBN and can be corrected as
According to ICBN, the first word denoting the genus (generic name) starts with a capital letter, while the specific epithet starts with a small letter.
Rest other options follow the rules of ICBN.

Question 17

Which one is the incorrectly written scientific name?

Accepted Answer

(d) Binomial nomenclature consists of two words, i.e. a generic name and a specific name. The first word denoting the genus starts with capital letter, while specific epithets start with small letter. In the scientific name Columba LIVIA, Columba is written correctly, while LIVIA is incorrect because species names are written in small letters. Thus, the correct form would be Columba livia.

Question 18

In binomial nomenclature, the name of author appears after the genus.

Accepted Answer

(b) In binomial nomenclature, the name of author appears after the species.

Question 19

The process by which anything is grouped into convenient categories based on some easily observable characters is

Accepted Answer

(b) Classification is the process by which anything is grouped into convenient categories based on some easily observable characters. It is important for establishing relationships amongst organisms.

Question 20

The scientific name of mango is written as Mangifera indica L. Which of the following statements is correct regarding this?

Accepted Answer

(c) The statement in option (c) is correct. Rest statements are incorrect and can be corrected as
Mangifera indica L is the scientific name of mango with ' L ' as the name of the author Linnaeus. Mangifera represents the genus and indica represents the species name.

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Solutions for CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 1 by Sanubia Salim, Yukta Khatri

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