1)

Human offspring’s sex is determined

Class 10 Biology

A)

through father’s sex chromosomes.

B)

through mother’s sex chromosomes.

C)

by hormones.

D)

by enzymes.

2)

Natural selection is called ‘survival of the fittest’. Which of the following statements best describes an organism?

Class 10 Biology

A)

How strong it is compared to other individuals of the same species.

B)

 How much food and resources it is able to gather for its offspring.

C)

The ability to adapt to the environment in the niche it occupies.

D)

The number of fertiie offspring it has.

3)

Which concept was not included in Charles Darwin’s theory of Natural Selection?

Class 10 Biology

A)

Struggle for existence

B)

Punctuated equilibrium

C)

Survival of the fittest

D)

Overproduction of offspring.

4)

What is the difference between genetic drift and change due to natural selection?

Class 10 Biology

A)

Genetic drift does not require the presence of variation.

B)

Genetic drift never occurs in nature, natural selection does.

C)

Genetic drift does not involve competition between members of a species.

D)

There is no difference.

5)

The more characteristics two species have in common :

Class 10 Biology

A)

More closely they are related and more recently they had a common ancestors.

B)

More distantly they are related and more recently they have common ancestors.

C)

More closely they are related and more distantly they have common ancestors.

D)

More distantly they are related and more distantly they have common ancestors.

6)

Differences between organisms in a species are described as variation. Which of the following would you describe as continuous variation?

Class 10 Biology

A)

Hair colour

B)

Eye colour

C)

sex

D)

Weight

7)

Which of the following is an example of genetic variation?

Class 10 Biology

A)

One person has a scar, but his friend does not.

B)

One person is older than another.

C)

Reeta eats meat, but her sister Geeta is a vegetarian.

D)

Two children have different eye colours.

8)

The process by which new species develop from the existing species is known as

Class 10 Biology

A)

Natural selection

B)

Evolution

C)

Artificial selection

D)

Speciation

9)

The remaps (or impressions) of dead animals or plant? that lived in the remote past are known as

Class 10 Biology

A)

extinct species

B)

fossils

C)

naturally selected species

D)

none of the above

10)

Those organs which have different basic structure but have similar appearance and perform similar functions are called

Class 10 Biology

A)

Analogous organs

B)

Homologous organs

C)

Vestigial organs

D)

None of these

11)

Those organs which have the same basic structure but different functions are called

Class 10 Biology

A)

Vestigial organs

B)

Analogous organs

C)

Homologous organs

D)

None of these

12)

Which of the following characters can be acquired but not inherited?

Class 10 Biology

A)

Colour of skin

B)

Size of body

C)

Colour of eyes

D)

Texture of hair

13)

A cross between two individuals results in a ratio of 9 : 3 : 3 :1 for four possible phenotypes of progeny. This is an example of a

Class 10 Biology

A)

Monohybrid cross

B)

Dihybrid cross

C)

Test cross

D)

F1 generation

14)

Which of the following decides the sex of the child?

Class 10 Biology

A)

male gamete, i.e., sperm

B)

female gamete, i.e., ovum

C)

both sperm and ovum

D)

mother

15)

Identify the two organisms which are now extinct and are studied from their fossils.

Class 10 Biology

A)

white tiger and sparrow

B)

dinosaur and fish (Knightia)

C)

ammonite and white tiger

D)

trilobite and white tiger

16)

The process of evolution of a species whereby characteristics which help individual organisms to survive and reproduce are passed on to their offspring and those characteristics which do not help are not passed on is called

Class 10 Biology

A)

Artificial selection

B)

Speciation

C)

Hybridization

D)

Natural selection

17)

Which of the following is the ancestor of ‘Broccoli’?

Class 10 Biology

A)

Cabbage

B)

Cauliflower

C)

Wild cabbage

D)

Kale

18)

The human species has genetic roots in

Class 10 Biology

A)

Australia

B)

Africa

C)

America

D)

Indonesia

19)

What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like?

Class 10 Biology

A)

All are tall with round seeds.

B)

All are short with round seeds.

C)

All are tall with wrinkled seeds.

D)

All are short with wrinkled seeds.

20)

A man with blood group A marries a woman having blood group O. What will be the blood group of the child?

Class 10 Biology

A)

O only

B)

A only

C)

AB

D)

Equal chance of acquiring blood group A or blood group O.

21)

 A zygote which has an X-chromosome inherited from the father will develop into a

Class 10 Biology

A)

Girl

B)

Boy

C)

either boy or girl

D)

X-chromosome does not influence the sex of a child.

22)

The number of pairs of sex chromosomes in the zygote of a human being is

Class 10 Biology

A)

1

B)

2

C)

3

D)

4

E)

5

23)

The theory of evolution of species by natural selection was given by

Class 10 Biology

A)

Mendel

B)

Darwin

C)

Lamarck

D)

Weismann

24)

Which one of the following pairs are homologous organs?

Class 10 Biology

A)

Forelimbs of a bird and wings of a bat.

B)

Wings of a bird and wings of a butterfly.

C)

Pectoral fins of a fish and forelimbs of a horse.

D)

Wings of a bat and wings of a cockroach.

25)

Heredity And Evolution Class 10 MCQ Question 1. Process of selecting individuals with desired characters by man is called

Class 10 Biology

A)

Hybridization

B)

Reproduction

C)

Artificial selection

D)

Natural selection