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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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A select subset of questions has been made available here.
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Question :

Fingers in humans are an example of


Answer :

Adaptation
Specialisation
Variation
Inheritance


Question :

Human offspring's sex is determined


Answer :

through father's sex chromosomes.
through mother's sex chromosomes.
by hormones.
by enzymes.


Question :

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


Answer :

How strong it is compared to other individuals of the same species.
How much food and resources it is able to gather for its offspring.
The ability to adapt to the environment in the niche it occupies.
The number of fertile offspring it has.


Question :

Two pea plants one with round green seeds (RRyy) and
another with wrinkled yellow (rrYY) seeds produce F1
progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination
of characters. Choose the new combination from the
following: (i) Round, yellow (ii)Round, green (iii) Wrinkled, yellow (iv)Wrinkled, green


Answer :

(i) and (ii)
(i) and (iv)
(ii) and (iii)
(i) and (iii)


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 :

New species may be formed if (i) DNA undergoes significant changes in germ cells
(ii) chromosome number changes in the gamete
(iii) there is no change in the genetic material
(iv) mating does not take place


Answer :

(i) and (ii)
(i) and (iii)
(ii), (iii) and (iv)
(i), (ii) and (iii)


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


Question :

Wild cabbage has evolved into new varieties like cabbage,
broccoli, and cauliflower by


Answer :

genetic drift
natural selection
reproductive isolation
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 :

Which prediction from the fossil record is in agreement
with the theory of evolution ?


Answer :

Unicellular organisms are first found in strata above multicellular fossils.
Land animals appear earlier than land plants in the fossil record.
Reptiles appear earlier ihan insects in the fossil record.
Prokaryote fossils appear earlier than eukaryote fossils.