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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 :

Which of the following is an example of genetic variation ?


Answer :

One person has a scar, but his friend does not.
One person is older than another.
Reeta eats meat, but her sister Geeta is a vegetarian.
Two children have different eye colours.


Question :

Some dinosaurs had feathers although they could not fly
but birds have feathers that help them to fly. In the context
of evolution this means that


Answer :

reptiles have evolved from birds
there is no evolutionary connection between reptiles and birds
feathers are homologous structures in both the organisms
birds have evolved from reptiles


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 :

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 :

Which of the following pairs of organs is analogous to each
other ?


Answer :

Leaf spines and leaf tendrils
Flipper of a whale and leg of a horse
Wings of an insect and wings of a bat
Forelimbs of a frog and human hand Heredity


Question :

Which of the following is a recessive trait in garden pea
plant ?


Answer :

Wrinkled seeds
Round seeds
Oval seeds
Coloured seed coat


Question :

From the list siven below, select the character which can be acquired but not inherited


Answer :

Colour of eye
Colour of skin
Size of body
Nature of hair


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 :

Which group of organisms is believed to be among the
earliest to evolve on Earth ?


Answer :

Protozoans
Reptiles
Arthropods
Coelenterates


Question :

In human males all the chromosomes are paired perfectly
except one. This/these unpaired chromosome is / are
(i) large chromosome
(ii) small chromosome
(iii) Y-chromosome
(iv) X-chromosome


Answer :

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