1. In majority of higher animals and plants, _____ and _____ are mutually exclusive events.

A. growth; nutrition
B. nutrition; consciousness
C. growth; reproduction
D. reproduction; consciousness

2. A group of plants and animals with similar traits of any rank is

A. Taxon
B. Species
C. Genus
D. Order

3. Energy flow and energy transformation in a living system follow

A. Biogenetic law
B. Law of thermodynamics
C. Law of limiting factor
D. Liebig’s law of minimum

4. The defining characteristic of living beings is

A. They reproduce
B. They can digest their food
C. They respond to external stimuli
D. They regenerate

5. In multicellular organisms, _____ refers to the production of progeny possessing features more or less similar to those of parents.

A. growth
B. reproduction
C. metabolism
D. consciousness

6. Families are characterized on which of the following features of plant species?

A. External morphology
B. Anatomy of parts
C. Vegetative and reproductive parts
D. Seasonal similarities and variations

7. The sum total of all the chemical reactions occurring in our body is known as

A. metabolism
B. growth
C. regeneration
D. reproduction

8. Nicotiana is a ————-

A. Species
B. Sub-species
C. Genus
D. Class

9. The scientific name of mango is

A. Mangifera indica
B. Mangifera Indica
C. Mangifera indica
D. Mangifera Indica

10. Cell division occurs _______ in plants and _______ in animals.

A. continuously, only upto a certain age
B. only upto a certain age, continuously
C. continuously, never
D. once, twice

Answer: 

1. Correct Answer : (C) growth; reproduction
Explanation: Growth and reproduction are mutually exclusive events in majority of the higher animals and plants. Growth may be defined as a positive change in size, often over a period of time. Growth can occur as a stage of maturation or a process toward fullness or fulfillment. Reproduction may be defined as the production of progeny possessing features more or less similar to those of parents.

2. Answer: A. Taxon

3. Answer: B. Law of thermodynamics

4. Answer: C. They respond to external stimuli

5. Answer: B. reproduction
Explanation: Reproduction ensures the continuity of the species, generation after generation. Genetic variation is created and inherited during reproduction.

6. Answer: C. Vegetative and reproductive parts

Explanation: A family is a subdivision of an order consisting of a group of related genera which in turn are composed of groups of related species. Families are characterized on the basis of vegetative and reproductive parts of the plants species.

7. Answer: A. metabolism

Explanation: All living organisms are continuously making or breaking biomolecules, such conversions are due to chemical reactions, and sum total of all such chemical reactions, occurring in the body is called metabolism. Each metabolic pathway in the cell is tightly regulated by enzymes.

8. Answer: C. Genus

9. Answer: C. Mangifera indica

10.  Answer: A. continuously, only upto a certain age
Explanation: All cells arise from pre-existing cells by a process of cell division. Cell division is the phenomenon of production of daughter cell from parent cell. It occurs continuously in plants and only up to a certain age in animals.

Practice MCQ Questions for class 11 Biology Chapter-Wise