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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 :

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 :

Select the group which shares maximum number of
common characters:


Answer :

Two individuals of a species
Two species of a genus
Two genera of a family
Two genera of two families


Question :

The link between organisms that show branching pattern
of evolutionary relationship are shown by


Answer :

two fossil layers
phylogenetic tree
comparative embryology
living fossils


Question :

The number of pair (s) of sex chromosomes in the zygote
of humans is


Answer :

one
two
three
four


Question :

Speciation is the evolutionary process by which


Answer :

hybrid species form.
a new gene pool is formed.
shows up differences in physical traits.
evolutionary paths of species converge.


Question :

In peas, a pure tall plant (TT) is crossed with a short plant
(tt). The ratio of pure tali plants to short plants in F2 is


Answer :

1:3
3:1
1:1
2:1


Question :

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


Answer :

Mendel
Darwin
Morgan
Lamarck


Question :

Which of these is homozygous recessive ?


Answer :

s
ss
Ss
SS


Question :

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


Answer :

Hair colour
Eye colou
Weight
Sex


Question :

f the fossil of an organism is found in the deeper layers of
earth, then we can predict that


Answer :

the extinction of organism has occurred recently
the extinction of organism has occurred thousands of years ago
the fossil position in the layers of earth is not related to its time of extinction
time of extinction cannot be determined