0 of 57 answered

Zoology

Evolution

57 questions · Click an option and press Check Answer to reveal the result

Not true for mutation:

Large variation

Sudden

Directionless

Gradual only

Life cannot originate now because:

Low pressure

Pollution

High oxygen

Lack of raw material

The figure shown below representing the-

Screenshot 2026-04-20 at 11.28.56 AM.png

Stabilisation

Directional change

Disruption

Genetic drift

Founder effect refers to:

Mutation

Migration

Genetic drift

Selection

Analogy is due to:

Unrelated species becoming similar in same environment

Related species becoming dissimilar

Unrelated species adapting differently

Related species becoming less similar

Homologous organs show:

Same function, different origin

Same structure, different origin

Same origin, different function

Same origin, same function

Correct example of convergent & divergent evolution:

Eyes of octopus & mammals; vertebrate forelimbs

Thorns & tendrils; bird wings

Forelimbs; tuber

Thorns & tendrils; eyes

Age of man:

Cretaceous

Cenozoic

Tertiary

Quaternary

Life appeared ……… years after the formation of earth:

5000 million

500 million

50 million

5 million

Supports natural selection:

Cloning

Transgenic animals

Pesticide resistance

Stem cells

Incorrect statement about human evolution:

Homo habilis = handy man

Homo erectus used fire

Neanderthal had smaller brain than habilis

Dryopithecus more ape-like

Incorrect fact:

Soot protects moths

Penicillin induces resistance

Completing antibiotics prevents resistance

Melanism is directional selection

False Hardy-Weinberg statement:

Evolution is deviation

Frequencies stable

Cannot measure evolution

Crossing over affects equilibrium

Match the following:

a–2, b–4, c–1, d–3

a–1, b–3, c–2, d–4

a–3, b–1, c–4, d–2

a–2, b–4, c–1, d–3

Which of the following comes in the evolutionary history of mammals ?

Synapsids, Therapsids

Thecodont, Synapsids

Sauropsids, Synapsids

Thecodont, Saurapsids

Which of the following is not a correct evolutionary sequence ?

Early reptile → Sauropsids → Thecodont → Dinosaurs

Ramapithecus → Australopithecus → Homo habilis → Java man

Tracheophytes → Bryophytes → Psilophyton → Bryophytes

Homo habilis → Homo erectus → Cro-magnon → Modern man

How many statements are true about below diagram –

(A) Before industrialisation in England there were more white winged moths
(B) Figure (a) shows the conditions before industrialisation in England and figure (b) after industrialisation in England
(C) During industrialisation the tree trunks become dark due to industrial smoke and soots
(D) During industrialisation both white-winged and dark winged survive

Two

Three

Four

one

Which of the following is an example of homologous organ ?

Eyes of octopus and mammal

Flippers of penguin and dolphin

Thorn of Bougainvillea and Tendril of Cucurbita

Potato and sweet potato

Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as:

Genetic drift

Random mating

Genetic load

Genetic flow

Modern theory of evolution includes:

Mutation

Natural selection

Reproductive isolation

All of these

Which of the following was NOT present in a free state in the primitive atmosphere?

Methane

Ammonia

Oxygen

Hydrogen

Wrong statement:

Potato & sweet potato analogous

Vertebrate forelimbs similar

Seal flipper etc are analogy

Insect vs bird wings different origin

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

Biogenesis

Recapitulation

Metamorphosis

Organic evolution

Theory of sudden variation:

Lamarck

Weismann

Hugo de Vries

Darwin

Main features of Darwin’s theory include:

Variation, mutation, struggle

Variation, overproduction, struggle, survival of fittest

Use & disuse, mutation

Inheritance of acquired characters

Which theory is known as ‘Primary abiogenesis’?

Biogenesis

Spontaneous generation

Chemical evolution

Panspermia

Mismatched pair:

Jurassic – ferns

Cretaceous – dicots

Mesozoic – dinosaurs

Tertiary – Homo habilis

The first organisms to appear on earth were most likely:

Chemoheterotrophs

Chemoautotrophs

Photoautotrophs

Decomposers

Lamarckism rejected because:

No evidence

Genes control inheritance

No short-neck giraffe

All of these

Which compound is formed by acetylation of morphine?

Heroin

Cocaine

Tobacco

Marijuana

Two key concepts of Darwinism:

Branching descent & natural selection

Use & disuse

Mutation & inheritance

Mutation & branching

Incorrect Hardy-Weinberg statement:

m² recessive

n² dominant

2mn heterozygous

All correct

Among the following how many organisms are marsupials, present in Australia :-
Tiger cat, Wombat, Lemur, Koala, Sugar glider, Flying squirrel.

Incorrect regarding evolution:

Evolution is stochastic

Mutations random

Darwinian variation large and sudden

Natural selection is mechanism

Given below are two statements:
Statement I: Cenozoic era is also called the “Age of Mammals”.
Statement II: Analogous organs have different origins but similar functions because different environments evolved in similar habitats.
In the light of the above statements, choose the most appropriate answer from the options given below:

Statement I is correct but Statement II is incorrect.

Statement I is incorrect but Statement II is correct.

Both Statement I and Statement II are correct.

Both Statement I and Statement II are incorrect.

Miller-Urey experiment condition:

CH4, NH3, H2, water vapour at 800°C

CH4, CO2, H2, water vapour

CH4, NH3, H2 at 8000°C

CO2, NH3, H2 at 8000°C

Fossils of Australopithecus were first discovered in:

Ethiopia

Tanzania

South Africa

Java

Invertebrates were formed and active about:

500 mya

320 mya

200 mya

450 mya

The process by which different species evolve from a common ancestor is:

Adaptive radiation

Convergent evolution

Genetic drift

Saltation

Which of the following is correct about the evolution?
i) Universe originated about 30 million years ago.
ii) Universe is formed by a galaxy, known as “milky way”
iii) Considering size of universe, earth is indeed a speck.
iv) Big-bang theory attempts to explain the origin of only our solar system.

Only i

Only ii

Only iii

Only iv

Correct statements regarding chemical evolution:

I & II

I & III

Only I

Only II

Darwinism explains:

Variation

Inheritance by genes

Use & disuse

Saltation

Examples of:

Convergent evolution

Adaptive radiation

Divergent evolution

Both B and C

Genetic equilibrium is maintained if there is no:

Mutation

Selection

Gene flow

All of these

The "Age of Fishes" is:

Devonian period

Silurian period

Ordovician period

Carboniferous period

Correct statements about fossils:

I & III

I, III & IV

I, II & III wrong

II & IV wrong

Correct evolution of man:

Dryopithecus → Ramapithecus → Australopithecus → Homo habilis → Homo erectus → Neanderthal → sapiens

Random order

Reverse order

Incorrect sequence

Human species using hides & burial:

Homo habilis

Homo erectus

Homo sapiens

Homo neanderthalensis

Select the incorrect statement among the following.

We have no idea about how the first self replicating metabolic capsule of life arose.

The first non-cellular forms of life could have originated 3 billion years back. They would have been giant molecules (RNA, Protein, Polysaccharides, etc.). These capsules reproduced their molecules perhaps.

The first cellular form of life did not possibly originate till about 2 million years ago. These were probably single-cells.

All life forms were in water environment only. This version of abiogenesis, i.e., the first form of life arose slowly through evolutionary forces from non-living molecules is accepted by majority.

Selection type (black & white survive, grey dies):

Directional

Disruptive

Stabilizing

Both B & C

Incorrect statement regarding Miller’s experiment:

Used CH₄, NH₃, H₂, water vapour

Temperature ~800°C

Produced nitrogenous bases and sugars

Supported chemical evolution

Select the correct group of Austration marsupials exhibiting adaptive radiation :

(a) Mole (b) Marsupial mole (c) Anteater (d) Numbat (acteater) (e) Mouse (f) Marsupial mouse (g) Lemur (h) Spotted cuscus (i) Flying squirrel (j) Flying phalanger (k) Bobcat (l) Tasmanian tiger cat (m) Wolf (n) Tasmanian wolf

Numbat, spotted cuscus, Flying phalanger

Mole, Anteater, Mouse, Lemur

Flying squirrel, Bobcat, Tasmanian wolf

Marsupial mole, Flying phalanger, Bobcat

Frequency of Bb if B=0.85:

0.7225

0.255

0.0225

0.12

Correct evolutionary sequence:

Unicellular → fishes → mammals

Unicellular → multicellular → invertebrates → fishes → amphibians → reptiles → birds → mammals

Unicellular → birds → reptiles

Random

Match List-I with List-II.
Choose the correct answer from the options given below:

List-I	List-II
A Adaptive Radiation	i Selection of drug resistant bacteria
B Convergent Evolution	ii Wings of butterfly and bird
C Divergent Evolution	iii Darwin’s Finches
D Anthropogenic Evolution	iv The development of Tendrils of Cucurbita

A-III, B-IV, C-II, D-I

A-I, B-II, C-IV, D-III

A-III, B-II, C-IV, D-I

A-I, B-II, C-III, D-IV

Which of the following is the most significant trend in human evolution?

Upright posture

Shortening of jaws

Binocular vision

Increasing cranial capacity

Industrial melanism:

Equal moths

Light more

Dark more

Light only

Question Palette

Unattempted

Correct

Incorrect

List-I

List-II

Adaptive Radiation

Selection of drug resistant bacteria

Convergent Evolution

Wings of butterfly and bird

Divergent Evolution

iii

Darwin’s Finches

Anthropogenic Evolution

The development of Tendrils of Cucurbita