Consider statements about evolution: 1. Natural selection was proposed by Darwin. 2. Mutation theory was proposed by de Vries. 3. Use and disuse theory was proposed by Lamarck. Which are correct? MCQ with Answer and Explanation

Consider statements about evolution: 1. Natural selection was proposed by Darwin. 2. Mutation theory was proposed by de Vries. 3. Use and disuse theory was proposed by Lamarck. Which are correct?
A. 1, 2 and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only
Answer: Option A
Solution (By JKSSB Mock Tests)
Charles Darwin proposed the theory of evolution by natural selection, emphasizing that organisms with favorable variations are more likely to survive and reproduce. Hugo de Vries, a Dutch botanist, proposed the mutation theory of evolution based on his work on evening primrose, stating that evolution occurs through sudden, large mutations (saltations). Jean-Baptiste Lamarck proposed the theory of inheritance of acquired characters, based on the use and disuse of organs (e.g., giraffe's neck). All statements are correct.

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Question #1
The condition in which the lens of the eye becomes cloudy, impairing vision, is:
A. Cataract
B. Myopia
C. Hypermetropia
D. Glaucoma

Correct Answer: Option A


Explanation:
Cataract is clouding of the crystalline lens leading to decreased vision, commonly age-related. Glaucoma is optic nerve damage often due to increased intraocular pressure. Myopia is nearsightedness, hypermetropia is farsightedness. Cataract surgery replaces the lens with an artificial one.

This question belongs to: Science Biology
Question #2
The amount of air that remains in the lungs after a normal tidal expiration is the:
A. Total lung capacity
B. Inspiratory capacity
C. Vital capacity
D. Functional residual capacity

Correct Answer: Option D


Explanation:
Functional residual capacity (FRC) is the volume of air in the lungs at the end of a normal expiration (ERV + RV). It prevents alveolar collapse and buffers gas concentrations. Vital capacity is max exhaled after max inhalation, total lung capacity is max air lungs can hold, inspiratory capacity is max inhaled after normal exhalation.

This question belongs to: Science Biology
Question #3
The scientist who proposed the 'mutation theory' of evolution was:
A. Charles Darwin
B. Hugo de Vries
C. Jean-Baptiste Lamarck
D. Alfred Wallace

Correct Answer: Option B


Explanation:
Hugo de Vries proposed the mutation theory in 1901 based on his experiments with evening primrose (Oenothera lamarckiana), suggesting that new species arise suddenly through large mutations. Darwin proposed gradual natural selection, Lamarck use-disuse, Wallace independently natural selection.

This question belongs to: Science Biology