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NEET • BIOLOGY • EVOLUTION
Evolution practice · Medium
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121
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Analyzing
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Assertion (A): The first living organisms were heterotrophs.
Reason (R): Hot Dilute soup was formed in the ocean.
Reason (R): Hot Dilute soup was formed in the ocean.
View answer and explanation
Correct option: B
If both (A) and (R) are true but (R) is not the correct explanation of (A)
Option B (If both (A) and (R) are true but (R) is not the correct explanation of (A)) is correct because while both the assertion about heterotrophs and the reason about the hot dilute soup are true, the hot dilute soup doesn't directly explain why the first organisms were heterotrophs.
122
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Analyzing
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All of the following are drawbacks of Darwin’s theory except
View answer and explanation
Correct option: D
This theory doesn’t explain the cause of struggle for existence
Option D is correct because Darwin's theory does address the struggle for existence, but doesn't explain its cause.
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Understanding
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Which of the following statement is correct regarding the evolution of humans?
I. The skull of adult chimpanzee is more like adult human skull than baby chimpanzee skull
II. The skull of baby chimpanzee is more like adult human than adult chimpanzee skull
III. Dryopithecus is oldest human like fossil
IV. Dryopithecus found in Miocene rock of Africa and Europe
The correct option is
I. The skull of adult chimpanzee is more like adult human skull than baby chimpanzee skull
II. The skull of baby chimpanzee is more like adult human than adult chimpanzee skull
III. Dryopithecus is oldest human like fossil
IV. Dryopithecus found in Miocene rock of Africa and Europe
The correct option is
View answer and explanation
Correct option: D
All excepts I
Option D (All excepts I) is correct because the skull of a baby chimpanzee is more like an adult human skull than an adult chimpanzee skull, and Dryopithecus is an old human-like fossil found in Africa and Europe.
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Remembering
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Who disproved the theory of spontaneous generation forever?
View answer and explanation
Correct option: A
Louis Pasteur
Option A (Louis Pasteur) is correct because Louis Pasteur's experiments definitively disproved the theory of spontaneous generation.
125
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Analyzing
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Assertion : Mutations are important for the
survival of a species.
Reason : A living species that would suppress
mutation process might gain a temporary
advantage in an unchanged environment.
survival of a species.
Reason : A living species that would suppress
mutation process might gain a temporary
advantage in an unchanged environment.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because mutations provide the raw material for evolution, and suppressing them would limit adaptability, even if it seems advantageous in a stable environment.
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Application
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A population is in Hardy – Weinberg equilibrium for a gene with only two alleles. If the gene frequency of an allele A is 0.7, the genotype frequency of Aa is
View answer and explanation
Correct option: B
0.42
Option B (0.42) is correct because it is calculated using the Hardy-Weinberg equation 2pq, where p = 0.7 and q = 0.3.
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Understanding
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Evolution is not continuous. It is a Jerky and a discontinuous process. This is the punch line of
View answer and explanation
Correct option: C
Mutational theory of evolution
Option C (Mutational theory of evolution) is correct because the mutational theory, proposed by Hugo de Vries, emphasizes that evolution occurs in discrete steps due to large mutations, rather than gradual changes.
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Understanding
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What do homologous organs indicates?
View answer and explanation
Correct option: B
Common ancestry
Option B (Common ancestry) is correct because homologous organs indicate that different species share a common evolutionary ancestor.
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Understanding
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Which of the following statement is true regarding the theory of natural selection?
View answer and explanation
Correct option: C
It has been failed to explain the origin of variations
Option D (It has been successful to explain the origin of variations) is incorrect. Darwin's theory of natural selection explains how existing variations are selected, but it does not fully explain the origin of these variations. The origin of variations was later explained by genetics and mutation.
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Remembering
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Oparin and Haldane’s theory is also called
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because Oparin and Haldane's theory is also known as the Chemical theory of origin of life, Modern theory of origin of life, and Naturalistic theory.
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Understanding
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Theory of special creation arguments that: I. all living organisms were created as such, II. the diversity was always the same since creation, III. earth is 4000 years old. Choose the right option to complete the given statement
View answer and explanation
Correct option: D
I, II and III
Option D (I, II and III) is correct because all three statements are arguments of the theory of special creation.
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Remembering
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The theory of random genetic drift was proposed by
View answer and explanation
Correct option: C
Sewall Wright
Option C is correct because Sewall Wright proposed the theory of random genetic drift.
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Understanding
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The greatest evolutionary change enabling the land vertebrates to be completely free from the water was the development of
View answer and explanation
Correct option: D
Shelled eggs and internal fertilization
Option D (Shelled eggs and internal fertilization) is correct because the development of shelled eggs and internal fertilization allowed reptiles to reproduce on land without the need for water, a crucial adaptation for terrestrial life.
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Application
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A gene locus has two alleles and , if the frequency of dominant allele is 0.6 then what will be the percentage of homozygous recessive individuals in the population?
View answer and explanation
Correct option: B
Option B () is correct because the percentage of homozygous recessive individuals is q2, where q is the frequency of the recessive allele.
135
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Understanding
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The theory of pangenesis was rejected due to the acceptance of
View answer and explanation
Correct option: D
Weismann theory of germplasm
Option D (Weismann theory of germplasm) is correct because Weismann's theory, which proposed that inheritance only occurs through germ cells, refuted the pangenesis idea of particles from body cells contributing to inheritance.
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Understanding
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Primary source of allelic variation is
View answer and explanation
Correct option: A
Due to long periods of evolutionary changes
Option B (Due to abrupt mutations) is correct because mutations are the primary source of new alleles, and while long periods of evolutionary change can lead to allele frequency shifts, the initial variation arises from mutation.
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Remembering
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In pleistocene epoch, the ancestor of horse is
View answer and explanation
Correct option: D
Equus
Option D (Equus) is correct because Equus is the genus that includes modern horses and was present during the Pleistocene epoch.
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Remembering
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Genetic drift in also known as
View answer and explanation
Correct option: D
Sewall Wright effect
Option D is correct because genetic drift is also known as the Sewall Wright effect, named after the population geneticist Sewall Wright.
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Understanding
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Which group is evolutionary modern?
View answer and explanation
Correct option: B
Grasses
Option B (Grasses) is correct because grasses (angiosperms) are a relatively recent evolutionary development compared to gymnosperms, pteridophytes, and algae.
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Remembering
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The concept of inheritance of acquired character in support of evolution was proposed by
View answer and explanation
Correct option: C
Lamarck
Option C (Lamarck) is correct because Lamarck proposed the theory of inheritance of acquired characteristics.
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Remembering
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Theory of natural selection was given by
View answer and explanation
Correct option: B
Darwin
Option B (Darwin) is correct because Charles Darwin is widely recognized as the primary proponent of the theory of natural selection.
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Understanding
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Australian marsupial - spotted cuscus shows convergent evolution with a placental mammal called _____. Choose the option that correctly fills the blank.
View answer and explanation
Correct option: C
Lemur
Option C (Lemur) is correct because lemurs and spotted cuscus share similar ecological niches and have evolved similar traits through convergent evolution.
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Understanding
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Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
View answer and explanation
Correct option: D
They could maintain an internal environment
Option A (They were able to reproduce) is correct because protobionts could not reproduce in the same way as living cells.
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Remembering
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Darwin differentiate …A… species of finches and grouped them into …B… main types.
Choose the correct option for A and B to complete the given statement
Choose the correct option for A and B to complete the given statement
View answer and explanation
Correct option: B
A-fifteen; B-six
Option B (A-fifteen; B-six) is correct because Darwin differentiated 15 species of finches and grouped them into 6 main types based on their beak morphology and feeding habits.
Revision notes and key takeaways
Review EVOLUTION in your textbook or class notes, then use this set to check your understanding.
Showing 121-144 of 144 questions