M.C.Q (1 Marks)

MCQ 2011 Mark

The gene frequency of a population changes $.........$

A
In one particular environment.
B
When the population decreases.
✓
When the population live in different conditions.
D
When population reproduces asexually.

Answer

Correct option: C.

When the population live in different conditions.

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MCQ 2021 Mark

Homologous organs indicate:

A
Convergent evolution.
✓
Divergent evolution.
C
Adaptive radiation.
D
Natural selection.

Answer

Correct option: B.

Divergent evolution.

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MCQ 2031 Mark

Correct order is:

A
Palaeozoic $\rightarrow$ Archaeozoic $\rightarrow$ Coenozoic.
B
Archaeozoic $\rightarrow$ Palaeozoic $\rightarrow$ Proterozoic.
✓
Palaeozoic $\rightarrow$ Mesozoic $\rightarrow$ Coenozoic.
D
Mesozoic $\rightarrow$ Archaeozoic $\rightarrow$ Proterozoic.

Answer

Correct option: C.

Palaeozoic $\rightarrow$ Mesozoic $\rightarrow$ Coenozoic.

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MCQ 2041 Mark

Evolution of life shows that life forms had a trend of moving from:

A
Land to water.
B
Dryland to wet land.
C
Fresh water to sea water.
✓
Water to land.

Answer

Correct option: D.

Water to land.

Most of the primitive organisms live in water, while most of the complex organisms live on land. This shows that evolution of life progressed from water to land.

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MCQ 2051 Mark

Hawaiian honeycreeper $($birds$)$ are an example of:

A
Darwin's Finches
✓
Adaptive radiation
C
Convergent evolution
D
Both $A$ and $B$

Answer

Correct option: B.

Adaptive radiation

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MCQ 2061 Mark

Which one of the following statements is correct?

A
Stem cells are specialized cells.
B
There is no evidence of the existence of gills during embryogenesis of mammals.
C
All plant and animal cells are totipotent.
✓
Ontogeny repeats phylogeny.

Answer

Correct option: D.

Ontogeny repeats phylogeny.

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MCQ 2071 Mark

Theory of natural selection dwells on:

A
Role of environment in evolution.
✓
Natural selection acting on favourable variations.
C
Changes in gene complex resulting in heritable variations.
D
None of the above.

Answer

Correct option: B.

Natural selection acting on favourable variations.

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MCQ 2081 Mark

Age of fossils in the past was generally determined by radio$-$carbon method and other method involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms, include.

A
Study of carbohydrates$/$ proteins in fossils
B
Study of the condition of fossilization.
✓
Electron Spin Resonance $\text{(ESR)}$ and fossil $\text{DNA}.$
D
Study of carbohydrates$/$ proteins in rocks.

Answer

Correct option: C.

Electron Spin Resonance $\text{(ESR)}$ and fossil $\text{DNA}.$

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MCQ 2091 Mark

$(p+q)^2=p^2+2 pq +q^2=1$ represents an equation used in:

✓
Population genetics.
B
Mendelian genetics.
C
Biometrics.
D
Molecular genetics.

Answer

Correct option: A.

Population genetics.

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MCQ 2101 Mark

The first mammals were like:

A
Chimpanzee.
B
Gorilla.
✓
Shrews.
D
Reptiles.

Answer

Correct option: C.

Shrews.

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MCQ 2111 Mark

Connecting link between man and ape was:

A
Dryopithecus
✓
Australopithecus
C
Homo habilis
D
Ramapithecus

Answer

Correct option: B.

Australopithecus

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MCQ 2121 Mark

At a particular locus, frequency of $'A\ '$ allele is $0.6$ and that of $'a\ '$ is $0.4.$ What would be the frequency of heterozygotes in a random mating population at equilibrium?

A
$0.16$
✓
$0.48$
C
$0.36$
D
$0.24$

Answer

Correct option: B.

$0.48$

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MCQ 2131 Mark

The experiment that simulated conditions thought to be present on the early earth:

✓
Miller$–$Urey experiment.
B
Schiehallion experiment.
C
Geiger$–$Marsden experiment.
D
Hershey$–$Chase experiment.

Answer

Correct option: A.

Miller$–$Urey experiment.

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MCQ 2141 Mark

Which of the following is$/$are primate$(s)?$

A
Monkey
B
Lemur
C
Baboon
✓
All of the above

Answer

Correct option: D.

All of the above

A primate is a mammal of the order Primates, which includes lemurs, lorises, tarsiers, monkeys, apes and humans. They exhibit menstrual cycle.
Primates arose from ancestors that lived in the trees of tropical forests. Most primate species remain at least partly arboreal.

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MCQ 2151 Mark

The existence of marsupials in Australia and New Zealand prove:

A
Genetic drift
B
Geological period
C
Continental drift
✓
Both $B$ and $C$

Answer

Correct option: D.

Both $B$ and $C$

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MCQ 2161 Mark

Hardy and weinberg principle explains $..........$

✓
Genetic equilibrium
B
Non random mating
C
Evolutionary force
D
Evolutionary forcec

Answer

Correct option: A.

Genetic equilibrium

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MCQ 2171 Mark

The recent ancestors of modern man were:

A
Java ape man and Peking man.
B
Peking man and Rhodesian Man.
C
Rhodesian man and Cro$-$Magnon man.
✓
Cro$-$Magnon man and Neanderthal man.

Answer

Correct option: D.

Cro$-$Magnon man and Neanderthal man.

Cro$-$Magnon is a name that has been used to describe the first early modern humans $($early Homo sapiens$).$ The Neanderthals are an extinct species of human in the genus Homo, possibly a subspecies of Homo sapiens. They are closely related to modern humans, differing in $\ce{DNA}$ by only $0.3\%.$

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MCQ 2181 Mark

The homologous organs are those that show similarity in:

A
Size
✓
Origin
C
Function
D
Appearance

Answer

Correct option: B.

Origin

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MCQ 2191 Mark

Temperature in the interior of the sun is above $20000000;$ the reason for this high temperature is:

A
Various exothermic reactions are taking place.
✓
Fusion converting hydrogen of sun to helium.
C
Collision of particles releasing energy.
D
None of the above.

Answer

Correct option: B.

Fusion converting hydrogen of sun to helium.

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MCQ 2201 Mark

Which of the following primate is the closest relative of humans?

A
Rhesus monkey
B
Orangutan
✓
Gorilla
D
Gibbon

Answer

Correct option: C.

Gorilla

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MCQ 2211 Mark

The theory of spontaneous generation stated that:

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

Answer

Correct option: C.

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

For a long time it was also believed that life came out of decaying and rotting matter like straw, mud, etc.
According to theory of abiogenesis, life originates from non$-$living.

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MCQ 2221 Mark

Analogous structures are a result of:

✓
Convergent evolution.
B
Divergent evolution.
C
Shared ancestry.
D
Stabilizing selection.

Answer

Correct option: A.

Convergent evolution.

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MCQ 2231 Mark

There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variation of $\text{DNA}$ however, suggested African origin of modern man. What kind of observation on $\text{DNA}$ variation could suggest this?

✓
Greater variation in Asia than in Africa.
B
Greater variation in Africa than in Asia.
C
Similar variation in Africa and Asia.
D
Variation only in Asia and no variation in Africa.

Answer

Correct option: A.

Greater variation in Asia than in Africa.

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MCQ 2241 Mark

Pithecanthropus erectus fossil was found in:

A
China
B
Japan
✓
Java
D
Texas

Answer

Correct option: C.

Java

Java man $($Homo erectus erectus or Pithecanthropus erectus$),$ was a sub species of Homo erectus, that lived around $0.6$ million years ago. His fossils have been discovered in Java. He lived in caves and used fire.

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MCQ 2251 Mark

Genetic drift is change of:

✓
Gene frequency in same generation.
B
Appearance of recessive genes.
C
Gene frequency from one generation to next.
D
None of the above.

Answer

Correct option: A.

Gene frequency in same generation.

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MCQ 2261 Mark

The Finches of Galapogas islands provide an evidence in favour of:

✓
Biogeographical evolution.
B
Special creation.
C
Evolution due to mutation.
D
Retrogressive evolution $\text{EBD}-7209$ Evolution $253.$

Answer

Correct option: A.

Biogeographical evolution.

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MCQ 2271 Mark

The first human fossil probably belonged to:

✓
Zinjanthropus
B
Australopithecus
C
Pleisanthropus
D
Pithecanthropus

Answer

Correct option: A.

Zinjanthropus

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MCQ 2281 Mark

Mesozoic era is associated with mass extinction of:

A
Flowering plants
B
Trilobites
C
Dodo
✓
Dinosaurs

Answer

Correct option: D.

Dinosaurs

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MCQ 2291 Mark

The atmosphere became oxidizing with the appearence of:

A
Autotrophic bacteria
✓
Cyanobacteria
C
Algae
D
Land plants

Answer

Correct option: B.

Cyanobacteria

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MCQ 2301 Mark

Which of the following is an example for link species?

✓
Lobe fish.
B
Dodo bird.
C
Sea weed.
D
Tyrannosaurus rex.

Answer

Correct option: A.

Lobe fish.

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MCQ 2311 Mark

Evolution of different species in a given area starting from a point and spreading to other geographical area is known as:

✓
Adaptive radiation
B
Natural selection
C
Migration
D
Divergent evolution

Answer

Correct option: A.

Adaptive radiation

Process of evolution of different species in a given area starting from a point and radiating to other area of geography $($habitats$)$ is called adaptive radiations. Example : Darwinian finches and Australian marsupials.

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MCQ 2321 Mark

For the $MN-$blood group system, the frequencies of $M$ and $N$ alleles are $0.7$ and $0.3,$ respectively. The expected frequency of $MN-$blood group bearing organisms is likely to be:

✓
$42\%.$
B
$49\%.$
C
$9\%.$
D
$58\%.$

Answer

Correct option: A.

$42\%.$

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MCQ 2331 Mark

Natural selection can lead to:

A
Stabilization.
B
Directional change.
C
Disruption.
✓
All of these.

Answer

Correct option: D.

All of these.

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MCQ 2341 Mark

Which type of selection is industrial melanism observed in moth, Biston bitularia:

A
Stabilising.
✓
Directional.
C
Disruptive.
D
Artificial.

Answer

Correct option: B.

Directional.

Industrial melanism is not a mean character but is acquired by most of the individuals. Hence, it is an example of directional change.

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MCQ 2351 Mark

The earliest geological time period among the following is:

✓
Cambrian
B
Permian
C
Jurassic
D
Quaternary

Answer

Correct option: A.

Cambrian

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MCQ 2361 Mark

Hardy$-$Weinberg equilibrium can be disturbed by:

A
Mutations
B
Non$-$random mating
C
Genetic drift
✓
All of the above

Answer

Correct option: D.

All of the above

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MCQ 2371 Mark

Reptiles were dominant during $.........$ period.

A
Permian
✓
Cretaceous
C
Canubran
D
Oligocene

Answer

Correct option: B.

Cretaceous

Cretaceous period was the last and the longest segment of the mesozoic era. It lasted approx. $79$ million years ago. During this time, reptiles were large in number and were dominant.

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MCQ 2381 Mark

Which of the following is used as an atmospheric pollution indicator?

✓
Lichens
B
Lepidoptera
C
Lycopersicon
D
Lycopodium

Answer

Correct option: A.

Lichens

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MCQ 2391 Mark

The chronological order of human evolution from early to the recent is:

✓
Ramapithecus $\rightarrow$ Australopithecus $\rightarrow$ Homo habilis $\rightarrow$ Homo erectus.
B
Australopithecus $\rightarrow$ Homo habilis $\rightarrow$ Ramapithecus $\rightarrow$ Homo erectus.
C
Australopithecus $\rightarrow$ Ramapithecus $\rightarrow$ Homo habilis $\rightarrow$ Homo erectus.
D
All of these.

Answer

Correct option: A.

Ramapithecus $\rightarrow$ Australopithecus $\rightarrow$ Homo habilis $\rightarrow$ Homo erectus.

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MCQ 2401 Mark

Darwin judged the fitness of individuals by:

A
Ability to defend itself.
B
Strategy to obtain food.
✓
Number of offspring produced.
D
Dominance over other individuals.

Answer

Correct option: C.

Number of offspring produced.

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MCQ 2411 Mark

Mammals arose from reptiles in:

A
Jurassic period of mesozoic era.
B
Triassic period of mesozoic era.
✓
Cretaceous period of mesozoic era.
D
Carboniferous age.

Answer

Correct option: C.

Cretaceous period of mesozoic era.

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MCQ 2421 Mark

Which of the following concept explains about the constant occurrence of allele frequencies generation after generation in a small population not influenced by evolution?

A
Mendel's principle of segregation.
B
Darwin's theory of natural selection.
C
Darwin's theory of survival of the fittest.
✓
The principle of Hardy-Weinberg equilibrium.

Answer

Correct option: D.

The principle of Hardy-Weinberg equilibrium.

d. The principle of Hardy-Weinberg equilibrium.

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MCQ 2431 Mark

The humming bird, hawk and the humming moth illustrate:

A
Adaptive radiation
B
Homology
✓
Convergent evolution
D
Divergent evolution

Answer

Correct option: C.

Convergent evolution

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MCQ 2441 Mark

A biogeographical evidence in favour of organic evolution is provided by:

A
Archaeopteryx.
B
Modern horse.
✓
Darwin’s finches.
D
Python.

Answer

Correct option: C.

Darwin’s finches.

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MCQ 2451 Mark

In which era mammals and birds evolved?

A
Mesozoic
✓
Cenozoic
C
Palaeozoic
D
Precambrian

Answer

Correct option: B.

Cenozoic

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MCQ 2461 Mark

Humans belong to the family?

✓
Hominidae
B
Pongidae
C
Hylobatidae
D
Ramapithecus

Answer

Correct option: A.

Hominidae

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MCQ 2471 Mark

Earliest reptiles evolved in the $...............$ period.

A
Ordovician
B
Silurian
C
Devonian
✓
Carboniferous

Answer

Correct option: D.

Carboniferous

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MCQ 2481 Mark

The most accepted line of descent in human evolution is:

A
Australopithecus $\rightarrow$ Ramapithecus $\rightarrow$ Homo sapiens $\rightarrow$ homo habilis.
B
Homo erectus $\rightarrow$ Homo habilis $\rightarrow$ Homo sapiens.
✓
Ramapithecus $\rightarrow$ Homo habilis $\rightarrow$ Homo erectus $\rightarrow$ Homo sapiens.
D
Australopithecus $\rightarrow$ Ramapithecus $\rightarrow$ Homo erectus $\rightarrow$ Homo habilis $\rightarrow$ Homo sapiens.

Answer

Correct option: C.

Ramapithecus $\rightarrow$ Homo habilis $\rightarrow$ Homo erectus $\rightarrow$ Homo sapiens.

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MCQ 2491 Mark

According to plate tectonics, how many plates the earth is made up of?

A
$10$
✓
$15$
C
$20$
D
$5$

Answer

Correct option: B.

$15$

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MCQ 2501 Mark

$..........$ is an example for adaptive radiation.

A
Darwins finches
B
Australian marsupial
✓
Both $(a)$ and $(b)$
D
Kangaroo

Answer

Correct option: C.

Both $(a)$ and $(b)$

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BIOLOGY M.C.Q (1 Marks)