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CBSE Notes 2011-2012 » Heredity and Evolution - Class 10 Biology MCQs (Free Practice Test)

Heredity and Evolution - Class 10 Biology MCQs (Free Practice Test)


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Question :

In which of the following ways is natural selection not
analogous to artificial selection ?


Answer :

Natural selection depends upon the presence of variation, artificial selection does not.
Natural selection occurs within populations, artificial selection does not.
With natural selection 'picking' is due to the fit of an organism with its environment whereas in artificial selection, the breeder 'picks' which organisms will breed.
There is a limit to how much change can be brought about by natural selection, no such limit exists for artificial selection.


Question :

In evolutionary terms, we have more in common with
[NCERT]


Answer :

a Chinese school-boy
a chimpanzee
a spider
a bacterium


Question :

A : Evolution is the gradual change which takes place in
organisms over millions of years and new species are
produced.
R : Heredity is the transmission of characters or traits from
parents to offsprings.


Answer :

Both "A' and 'R' are true and 'R' is the correct explanation of A.
Both 'A' and 'R' are true but 'R" is not the correct explanation of "A'.
'A' is false but 'R' is true
Both 'A' and 'R' are false.


Question :

A basket of vegetables contains carrot, potato, radish and
tomato. Which of them represent the correct homologous
structures ?


Answer :

Carrot and potato
Carrot and tomato
Radish and carrot
Radish and potato


Question :

An example of homologous organs is [NCERT]


Answer :

our arm and a dog's foreleg
our teeth and an elephant's tusks
potato and runners of grass
all of the above.


Question :

The two versions of a trait (character) which are brought
in by the male and female gametes are situated on


Answer :

copies of the same chromosome
two different chromosomes
sex chromosomes
any chromosome


Question :

A Mendelian experiment consists in breeding tall pea plants
bearing violet flowers with short pea plants bearing white
flowers. The progeny all bore violet flowers, but almost
half of them are short. This suggests that the genetic makeup
of the tall parent can be depicted as - [NCERT]


Answer :

TTWW
TTww
TtWW
TtWw


Question :

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


Answer :

boy
girl
X-chromosome does not determine the sex of a child
either boy or girl


Question :

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


Answer :

Genetic drift does not require the presence of variation.
Genetic drift never occurs in nature, natural selection does.
Genetic drift does not involve competition between members of a species.
There is no difference.


Question :

According to the evolutionary theory, formation of a new
species is generally due to


Answer :

sudden creation by nature
accumulation of variations over several generations
clones formed during asexual reproduction
movement of individuals from one habitat to another