Evolution Practice Questions
Class 12 · Biology · 2714 free MCQs with instant results and detailed explanations.
2714
Total
829
Easy
1362
Medium
523
Hard
Start Practicing Evolution
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Topics in Evolution
Adaptive Radiation
743
Hardy-Weinberg Principle
454
Origin of Life
770
Evidences of Evolution
747
Sample Questions from Evolution
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following theories suggests that life originated from simple organic compounds under primordial conditions?
A.
Biogenesis Theory
B.
Panspermia Theory
C.
Abiogenesis Theory
D.
Evolutionary Theory
Show Answer & Explanation
Correct Answer: C
Abiogenesis Theory states that life arose naturally from non-living matter, specifically simple organic compounds, under the right conditions on early Earth.
Q2
Easy
What was one of the significant contributions of the Miller-Urey experiment to the origin of life?
A.
Proving life can only arise from existing life.
B.
Demonstrating the synthesis of amino acids from inorganic compounds.
C.
Establishing that oxygen was essential for the formation of life.
D.
Showing that life can travel between planets.
Show Answer & Explanation
Correct Answer: B
The Miller-Urey experiment demonstrated that it is possible to synthesize organic compounds, such as amino acids, from inorganic precursors under simulated early Earth conditions.
Q3
Easy
The hypothesis that life from Earth was distributed to other celestial bodies by meteorites is known as:
A.
Biogenesis Theory
B.
Panspermia Theory
C.
Evolutionary Theory
D.
Spontaneous Generation Theory
Show Answer & Explanation
Correct Answer: B
Panspermia Theory posits that life did not originate on Earth but was brought to it from outer space via comets, meteorites, or cosmic dust.
Q4
Medium
Which of the following theories suggests that life originated from simple organic compounds?
A.
Abiogenesis
B.
Panspermia
C.
Biogenesis
D.
Catastrophism
Show Answer & Explanation
Correct Answer: A
Abiogenesis posits that life arose naturally from non-living matter, contrasting with biogenesis which states that life comes from existing life.
Q5
Medium
What is the significance of the Miller-Urey experiment in the context of the origin of life?
A.
It proved life can arise from inorganic substances
B.
It demonstrated the synthesis of organic compounds
C.
It showed that life is extraterrestrial
D.
It confirmed the theory of evolution
Show Answer & Explanation
Correct Answer: B
The Miller-Urey experiment simulated early Earth conditions and demonstrated that organic compounds could be synthesized from inorganic precursors, supporting abiogenesis.
Q6
Medium
Which of the following molecules is considered the building block of life?
A.
DNA
B.
RNA
C.
Proteins
D.
All of the above
Show Answer & Explanation
Correct Answer: D
DNA, RNA, and proteins are all critical components of biological life, each playing essential roles in genetics and cellular function.
Q7
Medium
Which statement aligns with the concept of natural selection in the origin of life?
A.
Life originated separately in various locations
B.
More complex forms arose from simpler forms
C.
All species were created simultaneously
D.
Mutation is irrelevant to evolution
Show Answer & Explanation
Correct Answer: B
Natural selection proposes that over time, complex forms of life evolved from simpler forms through variation and selection based on environmental pressures.
Q8
Hard
Which of the following hypotheses suggests that life originated from simple organic compounds formed in hydrothermal vents?
A.
Primordial Soup Hypothesis
B.
Hydrothermal Vent Hypothesis
C.
Panspermia Hypothesis
D.
RNA World Hypothesis
Show Answer & Explanation
Correct Answer: B
The Hydrothermal Vent Hypothesis posits that life began in the warm, nutrient-rich waters around hydrothermal vents on the ocean floor, where organic compounds could form.
Q9
Hard
Which of the following molecules is considered the first genetic material according to the RNA World Hypothesis?
A.
DNA
B.
RNA
C.
Proteins
D.
Lipids
Show Answer & Explanation
Correct Answer: B
The RNA World Hypothesis suggests that RNA was the first molecule of heredity, capable of storing genetic information and catalyzing reactions.
Q10
Hard
What is the significance of Miller-Urey experiment in the context of the origin of life?
A.
It demonstrated the formation of DNA.
B.
It simulated early Earth conditions for organic compound synthesis.
C.
It proved life can spontaneously arise.
D.
It identified the first living organism.
Show Answer & Explanation
Correct Answer: B
The Miller-Urey experiment simulated early Earth conditions and demonstrated that organic compounds could be synthesized from inorganic precursors, supporting theories about the origin of life.
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Other Class 12 Subjects
Evolution — Class 12 Biology Practice Questions Online
This page contains 2714 practice MCQs for the chapter Evolution in Class 12 Biology. The questions are organized by difficulty — 829 easy, 1362 medium, 523 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.