Assertion-Reason Type Questions: The Living World | Biology for Grade 11 PDF Download

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 1:
Assertion : Respiration is an anabolic process.
Reason : The biochemical reactions which are concerned with the synthesis of complex substances from simpler substances are collectively called catabolism.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (d)

Respiration is a catabolic process. It is a biochemical reaction which is concerned with breakdown of complex organic substances into simpler substances.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 2:
Assertion : The generic name begins with capital letter while specific name begins with small letter.
Reason : Scientifically mango is written as Mangifera indica.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (b)
Scientifically mango is written as Mangifera indica. The generic name begins with capital letter while specific name begins with small letter.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 3:
Assertion : Living organisms possess specific individually with definite shape and size.
Reason : Both living and non living entities resemble each other at lower level of organization.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (c)

Non living things do not have organization as seen in the living beings as: Cell organelles → Cells → Tissue → Organs → Organ system → Individual organism.

In multicellular organism the cell represent the level of organization not seen in non livings.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 4:
Assertion : Linnaeus is regarded as the father of taxonomy.
Reason : He gave a scheme of classification with a few exception is still used.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (a)
Linnaeus gave the sexual system of class and was the first who did the classification of plants on the basis of floral characters.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 5:
Assertion : There is no difference between the terms taxon and categories.
Reason : Aves is a class that includes category bird.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (d)

A category is an abstract term which represent rank or level in classification while taxon represents read biological objects assigned to a category. e.g. Taxon is a bird is aves and their category is class.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 6:
Assertion : Reproduction cannot be an allinclusive defining characteristic of living organisms.
Reason : Some organisms exhibit characteristics of living things but they do not reproduce.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (a)

Some organisms like mules, sterile worker bees, infertile human couples, etc., exhibit characteristics of living things but they do not reproduce. Therefore, reproduction cannot be an all inclusive defining characteristic of living organisms.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 7:
Assertion : Systematics is the branch of biology that deals with identification, naming and classification of the organisms into groups.
Reason : The aim of classification is to group the organisms.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (b)

Systematics is the branch of biology that deals with identification, naming and classification of the organisms into groups. The aim of classification is to group the organisms.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 8:
Assertion : Taxon and category are same things.
Reason : Taxon shows hierarchical classification of an organism.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (d)

Taxon and category are different things. A category is a rank or level in the hierarchical classification of organism while taxon is a unit in classification which may represent any level of grouping of organisms based in certain common characteristics.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 9:
Assertion : Growth is the final end product of successful metabolism.
Reason : Catabolic processes are more than the anabolic process in growth.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of
Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (c)
Growth occurs when anabolism exceeds catabolism because the later is a destructive process and former is a synthetic process.

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Question 10:
Assertion : Species are static units in classification.
Reason : Species changes over period of time.
(a) Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.

Correct Answer is option (d)
Species are dynamic, everchanging and genetically distinct group of organisms.