Charles Darwin proposed the theory of evolution by: MCQ with Answer and Explanation

Charles Darwin proposed the theory of evolution by:
A. Mutation theory
B. Natural selection
C. Inheritance of acquired characters
D. Use and disuse of organs
Answer: Option B
Solution (By JKSSB Mock Tests)
Charles Darwin, an English naturalist, proposed the theory of evolution by natural selection in his seminal book 'On the Origin of Species' (1859). His theory, based on observations from his voyage on the HMS Beagle (especially the Galapagos finches), states that species evolve over time through the process of natural selection, where individuals with advantageous traits are more likely to survive and reproduce.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1
The process by which a plant embryo resumes growth after a period of dormancy is:
A. Pollination
B. Germination
C. Fertilization
D. Vegetative propagation

Correct Answer: Option B


Explanation:
Germination is the resumption of metabolic activity and growth by the embryo within the seed, triggered by water, oxygen, and suitable temperature. Pollination is pollen transfer, fertilization gamete fusion, vegetative propagation asexual.

This question belongs to: Science Biology
Question #2
The hormone that stimulates the synthesis of milk in the mammary glands is:
A. Oxytocin
B. Progesterone
C. Prolactin
D. Estrogen

Correct Answer: Option C


Explanation:
Prolactin, secreted by the anterior pituitary, is the primary hormone responsible for milk synthesis (lactation) after childbirth. Oxytocin causes milk ejection (let-down reflex). Estrogen and progesterone stimulate mammary duct and alveolar development during pregnancy but inhibit milk secretion; after delivery, their levels drop, allowing prolactin to act.

This question belongs to: Science Biology
Question #3
The primary product of photosynthesis is:
A. Oxygen
B. NADPH
C. Glucose
D. ATP

Correct Answer: Option C


Explanation:
The Calvin cycle fixes CO₂ into glucose, which is the primary organic product of photosynthesis. Oxygen is a byproduct of water splitting.

This question belongs to: Science Biology