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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 :

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 branch of biology that deals with transmission of
characters from one generation to other is termed as


Answer :

evolution
genetics
heredity
biogenetic law


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.


Question :

Some types of variation are due to changes in the genetic
material. What is this type of change called ?


Answer :

Mutation
Sterilisation
Fertilisation
Radiation


Question :

Select the incorrect statement:


Answer :

Frequency of certain genes in a population change over several generations resulting in evolutio
Reduction in weight of the organism due to starvation is genetically controlled
Low weight parents can have heavy weight progeny
Traits which are not inherited over generations do not cause evolution


Question :

Answer :



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 :

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 :

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 :

One of the examples of two analogous organs can be the
wing of parrot and [CBSE Sample Paper 2003]


Answer :

flipper of whale
foreleg of horse
front leg of frog
wings of housefly