MCQ-Practice Test -Chapter 6- Evolution

Welcome to your Ncert -class 12- Biology- Evolution

Instruction

Total Questions : 20

Total Marks : 20 x 3 = 80 Marks

Each Correct Question carries : 4 Marks

Each incorrect Question Carries : -1 Marks

Each Unattempted Question carry : 0 Marks

Be careful On Negative Markings

Experimental proof that organic compounds formed the basis of evolution was given by :

Pasteur

Nucleoproteins

Oparin

Nucleic acids

None

Forelimbs of whales, bats, humans and cheetan are examples of which of the following processes?

Divergent evolution

Convergent evolution

Natural selection

Parallel evolution

None

Which one of the following correctly describes the homologous structures?

Organs with anatomical dissimilarities, but performing same function

Organs appearing only in embryonic stages and disappearing later in the adult.

Organs that have no function now, but had an important function in ancestors.

Organs with anatomical similarities, but performing different functions.

None

In the case of peppered moth(Biston betularia) the black-coloured from became dominant over the light-coloured form in England during industrial revolution. This is an example of.

Inheritance of darker colour character acquired due to the darker environment

Protective mimicry

Natural selection whereby the darker forms were selected

Appearance of the darker coloured individuals due to very poor sunlight

None

Given below are four statements (i) - (iv) regarding geological time sale. Read them carefully:

(i) Palaeozoic era is the era of ancient life.

(ii) Ordovician period is the age of vertebrates.

(iii) Giant ferns fall into coal deposits at the Triassic period.

(iv) Ichthyosaursare evolved during Triassic period.

Which of the following statements are correct?

(i) and (iii).

(i) and (iv).

(ii) and (iv).

(ii) and (iii).

None

Triangular plates on the back were the morphological character of which of the following dinosaurs?

Stegosaurus

Brachiosaurus

Tyrannosaurus

Triceratops

None

In random mating population in equilibrium, which of the following brings about a change in gene frequency in a nondirectional manner?

Selection

Mutations

Migration

Random drift

None

Which one of the following options gives one correct example each of convergent evolution and divergent evolution?

Thorns of Bougainvillea and tendrils of Cucurbita, Eyes of octopus and mammals

Bones of forelimbs of vertebrates, Wings of butterfly and birds

Thorns of Bougainvillea and tendrils of Cucurbita, Wings of butterfly and birds

Eyes of octopus and mammals, Bones of forelimbs of vertebrates

None

Two unrelated organisms that become similar in appearance and ways of life as they adapt to similar environmental situations exhibit ___________________.

Convergent evolution

Adaptive radiation

Homology

Parallel evolution

None

10.

Cacti and Euphobia are not easily distinguished because they grow under similar conditions of xenomorphic environment and show identical morphological adaptations. Such a type of parallel evolution is referred to as.

Progressive evolution

Divergent evolution

Convergent evolution

Retrogressive evolution

None

11.

Evolutionary convergence is characterised by

Replacement of common characteristics in different groups

Development of dissimilar characteristics in closely related groups

Development of a common set of characteristics in groups of different ancestry

Development of characteristics by random mating

None

12.

Correct sequence of stages in evolution of Modern Man/Homo sapiens sapiens is

Australopithecus, Neanderthal Man, Cro-Magnon Man, Homo erectus, Modern Man

Homo erectus, Australopithecus, Neanderthal Man, Cro-Magnon Man, Modern Man

Australopithecus, Homo erectus, Neanderthal Man, Cro-Magnon Man, Modern Man

Neanderthal Man, Australopithecus, Cro-Magnon Man, Homo erectus, Modern Man

None

13.

Given below are four statement (i) - (iv) regarding geological time scale. Read them carefully.

(i) Palaeozoic era is the era of ancient life.

(ii) Ordovician period is the age of vertebrates.

(iii) Carboniferous period is the age of reptiles

(iv) Proterozoic era is the era of early life.

Which of the above two statements are incorrect?

(ii) and (iv)

(ii) and (iii)

(i) and (iii)

(i) and (iv)

None

14.

The forces that change the allele and genotype frequencies of a population are

Recombination

Evolutionary agents

Adaptions

Acquired traits

None

15.

Consider the following st.atments :

1 The first living organisms on planet Earth originated in water.

2. When life originated on planet Earth, the atmosphere contained nitrogen,ammonia, ozone, hydrogen, caibon dioxide, methane and water vapour.

Which of the statements given above is/are correct?

2 only

Both 1 and 2

Neither 1 nor 2

1 only

None

16.

Mass extinction at the end of mesozoic era was probably caused by

Continental drift

Change in earth's orbit

Collision of earth with large meteorite

Massive glaciation

None

17.

Match List I (Life form) with List II (Means of Surviving the Siess) andselect the correct answer using the code given below the lists:Plant Life Forms

List I	List II
A. Chamaephytes	1. Buds are underground on rhizomes, bulbs, corms
B. Geophytes	2. Buds are located at the surface of soil, protected by leaf and stem bases
C. Hemicryptophytes	3. Annual life span; survive the stress as seeds
D. Therophytes	4. Buds are locate above ground, but low enough not to be exposed to strong winds

A-4, B-1, C-2, D-3

A-4, B-2, C-1, D-3

A-3. B-2, C-1, D-4

A-3, B-1, C-2, C-4

None

18.

According to our reading, how did George Cuvier account for extinctions in nature?

Extinctions are due to catastrophic events.

Extinctions occur when the slow adaptation of organisms over time to their environment is not quick enough to help them respond to changing conditions.

Extinctions never occur--there are unexplored parts of the globe where organisms that appear to have gone extinct may still live.

Extinctions occur at random, they do not reflect God's will.

None

19.

Which is correct order of increasing geological time scale for a hypothetical vertebrate evolution?

Cenozoic, palaeozoic, mesozoic, precambrain

Cenozoic, mesozoic, palaeozoic, precambrian

Precambrian, cenozoic, palaeozoic, mesozoic

Precambrian, palaeozoic, mesozoic cenozoic

None

20.

What is the correct arrangement of periods of Palaeozoic era in ascending order in geological time scale ?

Cambrian → → Devonian → → Ordovician → → Silurian → → Carboniferrous → → Permian

Silurian → → Devonian → → Cambrian → → Ordovician → → Permian → → Carboniferous

Cambrian → → Ordovician → → Silurian → → Devonian → → Carboniferous → → Permian

Cambrian → → Ordovician → → Devonian → → Silurian → → Carboniferrous → → Permian

None

Chapter 4 Principles of Inheritance and Variation

Chapter 5 -Molecular Basis Of Inheritance

Chapter 6- Evolution

Instruction

Curriculum

Ncert -Class 12 - unit VII - GENETICS AND EVOLUTION

Chapter 4 Principles of Inheritance and Variation

Chapter 5 -Molecular Basis Of Inheritance

Chapter 6- Evolution

MCQ-Practice Test -Chapter 6- Evolution

Instruction