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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 one provides correct sequence of events in origin
of new species according to Darwinism ?
(i) Natural selection
(ii) Variation and their inheritance
(iii) Survival of the fittest
(iv) Struggle for existence


Answer :

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


Question :

Which of the following statement is incorrect ?


Answer :

For every hormone there is a gene.
For every protein there is a gene.
For production of every enzyme there is a gene.
For every molecule of fat there is a gene.


Question :

The structural similarities between the flippers of whales
and the arms of humans are used to show that the


Answer :

whales evolved from the human species
whales are older than the human species
human species began life in the oceans
human species and whales have a common ancestor.


Question :

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


Answer :

Mendel
Darwin
Morgan
Lamarck


Question :

According to Darwin's theory of evolution, differences
between species may be the result of


Answer :

natural selection
mutagenic agents
the disuse of body structures.
the transmission of acquired characteristics.


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 statements that describe characteristics of genes :
(i) Genes are specific sequence of bases in a DNA
molecule
(ii) A gene does not code for proteins
(iii) In individuals of a given species, a specific gene
is located on a particular chromosome
(iv) Each chromosome has only one gene


Answer :

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


Question :

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


Answer :

Struggle for existence
Punctuated equilibrium
Survival of the fittest
Overproduction of offspring.


Question :

was a predecessor of Darwin's and developed
the theory of acquired characteristics.


Answer :

Mendel
Lamarck
Weismann
Whittaker


Question :

One of the following is a correct statement:


Answer :

Dominant trait cannot be expressed in heterozygous condition.
Dominant trait is expressed in homozygous condition.
Recessive trait can only be expressed in homozygous condition
Recessive trait can always be expressed in heterozygous condition.