Consider statements about evolution: 1. Fossils provide evidence of past life. 2. Analogous organs have different evolutionary origins. 3. Lamarck proposed natural selection. Which are correct? MCQ with Answer and Explanation

Question

Consider statements about evolution: 1. Fossils provide evidence of past life. 2. Analogous organs have different evolutionary origins. 3. Lamarck proposed natural selection. Which are correct?

A. 1, 2 and 3

B. 2 and 3 only

C. 1 and 3 only

D. 1 and 2 only

Answer: Option D

Solution (By JKExamLibrary)

Fossils are the preserved remains or traces of ancient organisms, providing crucial evidence for evolution. Analogous organs (like wings of birds and insects) perform similar functions but have different structural plans and evolutionary origins, indicating convergent evolution. Jean-Baptiste Lamarck proposed the theory of inheritance of acquired characters, while Charles Darwin proposed natural selection. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology

Request complete Subject PDF

Discuss this Question (0)

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

Practice More Biology Questions

Question #1

Share Report

The disorder characterized by repetitive seizures due to abnormal brain electrical activity is:

A. Epilepsy

B. Stroke

C. Meningitis

D. Multiple sclerosis

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Epilepsy is a neurological disorder marked by recurrent seizures caused by excessive and synchronous neuronal firing. Stroke is from interrupted blood supply, MS is demyelination, meningitis is inflammation of meninges.

This question belongs to: Science Biology

Question #2

Share Report

The process of separating proteins based on their net charge is:

A. SDS-PAGE

B. Gel filtration chromatography

C. Ion exchange chromatography

D. Affinity chromatography

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
Ion exchange chromatography separates proteins based on their net surface charge; positively charged proteins bind to cation exchangers, negatively to anion exchangers. Gel filtration separates by size, affinity by specific binding, SDS-PAGE by molecular weight.

This question belongs to: Science Biology

Question #3

Share Report

The vitamin that acts as a coenzyme in transamination reactions is:

A. Niacin

B. Pyridoxine (B₆)

C. Thiamine

D. Riboflavin

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option B

Explanation:
Pyridoxal phosphate (PLP), the active form of vitamin B₆, is a coenzyme for transaminases (ALT, AST), decarboxylases, and other enzymes in amino acid metabolism. Thiamine in decarboxylation of keto acids, riboflavin in redox, niacin in NAD/NADP.

This question belongs to: Science Biology

Explore All Biology MCQs