Evolusi Practice Questions
UN (Indonesia) · UN Biologi · 149 free MCQs with instant results and detailed explanations.
149
Total
43
Easy
77
Medium
29
Hard
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Sample Questions from Evolusi
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Q1
Easy
Which of the following best describes 'survival of the fittest'?
A.
Only the strongest survive
B.
Organisms with the best adaptations survive
C.
All species evolve at the same rate
D.
Survival is only due to luck
Show Answer & Explanation
Correct Answer: B
'Survival of the fittest' refers to how organisms that are better adapted to their environment are more likely to survive and reproduce. It does not solely refer to strength, but to overall fitness.
Q2
Easy
In the context of evolution, what does the term 'speciation' refer to?
A.
The extinction of a species
B.
The formation of new species
C.
The migration of species
D.
The adaptation of species to an environment
Show Answer & Explanation
Correct Answer: B
Speciation is the evolutionary process by which new biological species arise. This typically occurs when populations become isolated and diverge genetically over time.
Q3
Easy
Which of the following best describes the term 'speciation'?
A.
The process of extinction of a species
B.
The formation of new and distinct species in the course of evolution
C.
The variation of traits within a population
D.
The adaptation of organisms to their environment
Show Answer & Explanation
Correct Answer: B
Speciation refers to the evolutionary process by which populations evolve to become distinct species. This can occur through various mechanisms such as geographic isolation.
Q4
Medium
Which of the following factors is NOT a mechanism of evolution?
A.
Mutation
B.
Natural Selection
C.
Genetic Drift
D.
Symbiosis
Show Answer & Explanation
Correct Answer: D
Symbiosis refers to the interaction between different species, while mutation, natural selection, and genetic drift are all direct mechanisms that lead to evolution by changing genetic frequencies in populations.
Q5
Medium
What is the term for a trait that enhances survival and reproduction in a specific environment?
A.
Adaptation
B.
Mutation
C.
Phenotype
D.
Genotype
Show Answer & Explanation
Correct Answer: A
Adaptation is the process through which a species becomes better suited to its environment, resulting in traits that improve survival and reproduction.
Q6
Medium
In the context of evolution, what does the 'founder effect' refer to?
A.
A population becomes extinct.
B.
A small group establishes a new population.
C.
Genetic variation increases in a population.
D.
A species adapts to a new environment.
Show Answer & Explanation
Correct Answer: B
The founder effect occurs when a small group of individuals breaks away from a larger population to establish a new population, which can lead to reduced genetic diversity.
Q7
Medium
Which of the following best describes the concept of 'survival of the fittest'?
A.
Only the strongest individuals survive.
B.
Organisms that are best adapted to their environment survive.
C.
All members of a species survive equally.
D.
Survival is random and without preference.
Show Answer & Explanation
Correct Answer: B
'Survival of the fittest' refers to the idea that organisms best suited to their environments are more likely to survive and reproduce, not just the strongest individuals.
Q8
Hard
Which of the following best describes the concept of adaptive radiation in evolutionary biology?
A.
The evolution of similar traits in different species due to similar environmental pressures.
B.
The diversification of a common ancestor into various forms that adapt to different environments.
C.
The gradual change of species over time through a series of small, incremental changes.
D.
The process by which unrelated organisms develop similar characteristics in similar environments.
Show Answer & Explanation
Correct Answer: B
Adaptive radiation occurs when a single ancestor species evolves into a variety of forms that exploit different ecological niches, leading to diversification.
Q9
Hard
In the process of natural selection, which of the following factors is primarily responsible for determining which individuals survive and reproduce?
A.
The genetic diversity within a population.
B.
The physical environment and its resources.
C.
The mating preferences of individuals in the population.
D.
The random mutations that occur in the gene pool.
Show Answer & Explanation
Correct Answer: B
Natural selection is driven by environmental pressures that favor certain traits over others, impacting survival and reproduction based on how well individuals adapt to their surroundings.
Q10
Hard
Which of the following best explains the concept of 'adaptive radiation' as observed in Darwin's finches?
A.
The process where a single ancestral species diversifies into multiple forms to exploit different environments.
B.
The gradual change in species due to natural selection and genetic drift over time.
C.
The extinction of species due to environmental changes that are too rapid for adaptation.
D.
The random mating of organisms leading to increased genetic variation without environmental influence.
Show Answer & Explanation
Correct Answer: A
Adaptive radiation refers to the diversification of a common ancestor into various forms that adapt to different ecological niches. This concept was famously illustrated by Darwin's finches, which evolved different beak shapes to exploit available food sources on the Galápagos Islands.
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Evolusi — UN (Indonesia) UN Biologi Practice Questions Online
This page contains 149 practice MCQs for the chapter Evolusi in UN (Indonesia) UN Biologi. The questions are organized by difficulty — 43 easy, 77 medium, 29 hard — so you can choose the right level for your preparation.
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