M.C.Q (1 Marks)

MCQ 511 Mark

In which condition the gene ratio remains constant for any species?

A
Sexual selection.
✓
Random mating.
C
Mutation.
D
Gene flow.

Answer

Correct option: B.

Random mating.

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MCQ 521 Mark

Darwin’s finches provide an excellent evidence in favour of evolution. This evidence comes from the field of:

✓
Biogeography
B
Anatomy
C
Embryology
D
Palaeontology

Answer

Correct option: A.

Biogeography

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MCQ 531 Mark

In $1953 \ \text{S.L.}$ Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from preexisting non$-$living organic molecules. The primitive earth conditions created include:

A
Low temperature, volcanic storms, atmosphere rich in oxygen.
B
Low temperature, volcanic storms, reducing atmosphere.
C
High temperature, volcanic storms, non$-$reducing atmosphere.
✓
High temperature, volcanic storms, reducing atmosphere containing $\mathrm{CH}_4, \mathrm{NH}_3$ etc.

Answer

Correct option: D.

High temperature, volcanic storms, reducing atmosphere containing $\mathrm{CH}_4, \mathrm{NH}_3$ etc.

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MCQ 541 Mark

The presence of gill slits, in the embryos of all vertebrates, supports the theory of:

A
Biogenesis
✓
Recapitulation
C
Metamorphosis
D
Organic evolution

Answer

Correct option: B.

Recapitulation

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MCQ 551 Mark

The extinct human who lived $1,00,000$ to $40,000$ years ago, in Europe, Asia and parts of Africa, with short stature, heavy eye brows, retreating for heads, large jaws with heavy teeth, stocky bodies a lumbering gait and stooped posture was:

A
Cro$-$magnon humans.
B
Rampithecus.
C
Homo habilis.
✓
Neanderthal human.

Answer

Correct option: D.

Neanderthal human.

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MCQ 561 Mark

Jurassic period of the Mesozoic era is characterized by:

A
Radiation of reptiles and origin of mammal$-$like reptiles.
B
Dinosaurs become extinct and angiosperms appear.
C
Flowering plants and first dinosaurs appear.
✓
Gymnosperms are dominant plants and first birds appear.

Answer

Correct option: D.

Gymnosperms are dominant plants and first birds appear.

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MCQ 571 Mark

"Continuity of germplasm" theory was given by:

A
Devries
✓
Weismann
C
Darwin
D
Lamarck

Answer

Correct option: B.

Weismann

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MCQ 581 Mark

Which type of homology exists between arm and leg of man and horse?

✓
Phylogenetic
B
Sexual
C
Serial
D
None of the above

Answer

Correct option: A.

Phylogenetic

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MCQ 591 Mark

Coenozoic era is known as:

A
Age of Amphibia and Lycopods.
B
Age of Marine Invertebrate.
C
Age of Reptiles and gymnosperms.
✓
Age of Mammals and Modern flora.

Answer

Correct option: D.

Age of Mammals and Modern flora.

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MCQ 601 Mark

First mammals appeared in the period:

✓
Triassic
B
Jurassic
C
Cretaceous
D
Tertiary

Answer

Correct option: A.

Triassic

Triassic period, in geologic time, the first period of the Mesozoic era. It began $252$ million years ago.
Reptiles increased in diversity and number, and the first dinosaurs appeared during this period along with the appearance of first mammals.

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MCQ 611 Mark

Animal husbandry and plant breeding programmes are the examples of:

A
Reverse evolution.
✓
Artificial selection.
C
Mutation.
D
Natural selection

Answer

Correct option: B.

Artificial selection.

Animal husbandry and plant breeding programmes need human intervention and desirable characters are introduced in plants and animals through manipulation. Hence, these are examples of artificial selection.

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MCQ 621 Mark

Which one of the following is the direct ancestor of modern man?

A
Australopithecus
B
Ramapithecus
✓
Homo erectus
D
Homo habilis

Answer

Correct option: C.

Homo erectus

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MCQ 631 Mark

The chance of elimination of genes from a small population is an example of:

A
Selection pressure
B
Speciation
C
Adaptation
✓
Genetic drift

Answer

Correct option: D.

Genetic drift

A small population is not in Hardy Weinberg Equilibrium and may lose alleles due to Genetic Drift.

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MCQ 641 Mark

Eobionts are also called:

A
Pre $–$ cells
B
Protocells
C
Protobionts
✓
All of the above

Answer

Correct option: D.

All of the above

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MCQ 651 Mark

Common origin of man and chimpanzee is best shown by:

✓
Banding pattern in chromosomes number $3$ and $6.$
B
Cranial capacity.
C
Binocular vision.
D
Dental formula.

Answer

Correct option: A.

Banding pattern in chromosomes number $3$ and $6.$

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MCQ 661 Mark

Which primitive man lived on earth at the end of pleistocene era?

A
Australopithecus
B
Zinzanthropus
✓
Neanderthal man
D
Atlantic man

Answer

Correct option: C.

Neanderthal man

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MCQ 671 Mark

The theory of spontaneous generation stated that:

✓
Life can arise from non$-$living things only.
B
Life arises spontaneously, neither from living nor from the non$-$living.
C
Life can arise from both living and non$-$living.
D
Life arose from living forms only.

Answer

Correct option: A.

Life can arise from non$-$living things only.

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MCQ 681 Mark

Hardy$-$Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination and:

A
Evolution
B
Limiting factors
C
Saltation
✓
Natural selection

Answer

Correct option: D.

Natural selection

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MCQ 691 Mark

'Homo erectus' is the zoological name of:

A
Cro$-$Magnon man
✓
Pecking man
C
Nut$-$cracker man
D
Neanderthal man

Answer

Correct option: B.

Pecking man

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MCQ 701 Mark

Palaentological evidences for evolution refer to the:

✓
Fossils.
B
Homologous organs.
C
Development of embryo.
D
Analogous organs.

Answer

Correct option: A.

Fossils.

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MCQ 711 Mark

According to fossils discovered up to present time origin and evolution of man was started from:

A
France
B
Java
✓
Africa
D
China

Answer

Correct option: C.

Africa

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MCQ 721 Mark

Appearance of antibiotic$-$resistant bacteria is an example of:

✓
Pre$-$existing variation in the population.
B
Divergent evolution.
C
Transduction.
D
Adaptive radiation.

Answer

Correct option: A.

Pre$-$existing variation in the population.

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MCQ 731 Mark

Single step large mutation leading to speciation is also called.

A
Founder effect.
✓
Saltation.
C
Branching descent.
D
Natural selection.

Answer

Correct option: B.

Saltation.

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MCQ 741 Mark

Artificial selection to obtain cows yielding higher milk output represents.

A
Stabilizing selection as it stabilizes this character in the population.
✓
Directional as it pushes the mean of the character in one direction.
C
Disruptive as it splits the population into two, one yielding higher output and the other lower output.
D
Stabilizing followed by disruptive as it stabilizes the population to produce higher$-$yielding cows.

Answer

Correct option: B.

Directional as it pushes the mean of the character in one direction.

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MCQ 751 Mark

The English scientist who worked on origin of life and then settled in India was:

A
L. Pasteur
B
Urey
C
Oparin
✓
Haldane

Answer

Correct option: D.

Haldane

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MCQ 761 Mark

Which one is irrelevant to evolution of man?

A
Perfection of hand for tool making.
B
Change of diet from hard nuts$/$ roots to soft food.
C
Increased ability to communicate or develop community behaviour.
✓
Loss of tail.

Answer

Correct option: D.

Loss of tail.

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MCQ 771 Mark

Adaptation is a type of:

A
Convergent evolution
B
Satabilizing selection
✓
Adaptive radiation
D
Speciation

Answer

Correct option: C.

Adaptive radiation

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MCQ 781 Mark

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:

A
$0.21$
✓
$0.42$
C
$0.36$
D
$0.7$

Answer

Correct option: B.

$0.42$

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MCQ 791 Mark

The brain capacity of Homo erectus was:

✓
$800$ to $1300\ cc$
B
$1650\ cc$
C
$650\ cc$
D
$1400\ cc$

Answer

Correct option: A.

$800$ to $1300\ cc$

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MCQ 801 Mark

Radiations with successful adaptations in case of insects is a result of:

A
Genetic divergence
B
Micro$-$evolution
✓
Macro$-$evolution
D
Mega$-$evolution

Answer

Correct option: C.

Macro$-$evolution

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MCQ 811 Mark

Change of frequency of alleles in a population results in evolution. This statement is proposed in:

A
Darwin's theory.
B
Lamarck's theory.
✓
Hardy$-$Weinberg principle.
D
de Vries theory.

Answer

Correct option: C.

Hardy$-$Weinberg principle.

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MCQ 821 Mark

Man evolved in:

A
Triassic period
B
Jurassic
C
Permian period
✓
Pliocene

Answer

Correct option: D.

Pliocene

The Pliocene epoch extends from $5.332$ million to $2.588$ million years before present. Man evolved in this era.

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MCQ 831 Mark

In recent years, $\text{DNA}$ sequences $($nucleotide sequence$)$ of maternal $\text{DNA}$ and $\text{Y}-$chromosomes were considered for the study of human evolution, because.

A
They can be studied from the samples of fossil remains.
B
They are small and, therefore, easy to study.
✓
They are uniparental in origin and do not take part in recombination.
D
Their structure is known in greater detail.

Answer

Correct option: C.

They are uniparental in origin and do not take part in recombination.

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MCQ 841 Mark

Hardy Weinberg law is applicable to:

✓
Genetic equilibrium
B
Small population
C
Non$-$random mating
D
None of the above

Answer

Correct option: A.

Genetic equilibrium

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MCQ 851 Mark

Theory of inheritance of acquired characters was given by:

A
Wallace
✓
Lamarck
C
Darwin
D
Devries

Answer

Correct option: B.

Lamarck

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MCQ 861 Mark

Which one among the following is an example for homology?

A
Eye of octopus and mammals.
B
Tuber of sweet potato and potato.
C
Flippers of penguins and dolphins.
✓
Thorns and tendrils of Bougainvillea and Cucurbita.

Answer

Correct option: D.

Thorns and tendrils of Bougainvillea and Cucurbita.

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MCQ 871 Mark

During origin of life, nucleoprotein gave most probably the first sign of:

✓
Life
B
Amino Acids
C
Soil
D
Sugar

Answer

Correct option: A.

Life

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MCQ 881 Mark

An old view about evolution states that the organisms were created by a super organism in the same condition as they exist now. This theory is called as:

✓
Theory of special creation.
B
Theory of natural selection.
C
Lamarck's theory of evolution.
D
Theory of spontaneous generation.

Answer

Correct option: A.

Theory of special creation.

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MCQ 891 Mark

The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because:

A
One organism has given rise to another.
✓
They share a common ancestor.
C
They perform the same function.
D
The have biochemical similarities.

Answer

Correct option: B.

They share a common ancestor.

Similarity in structural design indicates towards a common ancestry.

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MCQ 901 Mark

Parallelism is:

A
Adaptive divergence.
B
Adaptive divergence of widely separated species.
C
Adaptive convergence of widely different species.
✓
Adaptive convergence of closely related groups.

Answer

Correct option: D.

Adaptive convergence of closely related groups.

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MCQ 911 Mark

Select the correct statement from the following options:

A
Mutations are random and directional.
B
Darwinian variations are small and direction less.
✓
Fitness is the end result of the ability to adapt and get selected by nature.
D
All mammals have evolved vivipary as an adaptation.

Answer

Correct option: C.

Fitness is the end result of the ability to adapt and get selected by nature.

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MCQ 921 Mark

Similarity developed in distantly related groups as an adaptation to the same function is called as:

✓
Convergent evolution
B
Connecting link
C
Missing link
D
Divergent evolution

Answer

Correct option: A.

Convergent evolution

Convergent evolution means distantly related groups have different forms of structures or adaptation for performing similar functions.

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MCQ 931 Mark

Wings of mosquito, bats, birds is $...........$ evolution.

✓
Convergent
B
Divergent
C
Adaption
D
Parallel

Answer

Correct option: A.

Convergent

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MCQ 941 Mark

Palaentological evidences for evolution refer to the:

A
Development of embryo.
B
Homologous organs.
✓
Fossils.
D
Analogous organs.

Answer

Correct option: C.

Fossils.

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MCQ 951 Mark

Archeopteryx, a transitional fossil between birds and reptiles was discovered from the rocks of following period:

✓
Jurassic
B
Archeozoic era
C
Cretaceous
D
Triassic

Answer

Correct option: A.

Jurassic

Archaeopteryx, intermediate between reptiles and birds, originated towards the close of Jurassic period.

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MCQ 961 Mark

Darwin in his ‘Natural Selection Theory’ did not believe in any role of which one of the following in organic evolution?

✓
Discontinuous variations.
B
Parasites and predators as natural enemies.
C
Survival of the fittest.
D
Struggle for existence.

Answer

Correct option: A.

Discontinuous variations.

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MCQ 971 Mark

First cell produced on earth is:

✓
Protobiont
B
Protozoa
C
Metazoa
D
None of the above

Answer

Correct option: A.

Protobiont

First cells produced were simple aggregates of organic compounds, called protobionts, which are thought to be precursors of prokaryotes.

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MCQ 981 Mark

The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because:

✓
They share a common ancestor.
B
One organism has given rise to another.
C
They perform the same function.
D
The have biochemical similarities.

Answer

Correct option: A.

They share a common ancestor.

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MCQ 991 Mark

Coacervates were experimentally produced by:

A
Urey and Miller
B
Jacob and Monod
C
Fischer and Huxley
✓
Sidney Fox and Oparin

Answer

Correct option: D.

Sidney Fox and Oparin

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MCQ 1001 Mark

One of the following is a link between plants and animals.

✓
Euglena
B
Bacteria
C
Paramecium
D
Trichonympha

Answer

Correct option: A.

Euglena

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Biology M.C.Q (1 Marks)