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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 :

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 :

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


Answer :

Protozoans
Reptiles
Arthropods
Coelenterates


Question :

A cross between a tall plant (TT) and short pea plant (tt)
resulted in progeny that were all tall plants because


Answer :

tallness is the dominant trail
shortness is the dominant trait
tallness is the recessive trait
height of pea plant is not governed by gene T ' o r ' t '


Question :

Study of fossils is known as


Answer :

Paleobotany
Anatomy
Palaeontology
Ornithology


Question :

Heredity or inheritance of specific traits became clearer
due to


Answer :

Darwinism
Neo-Darwinism
Mendel's work on garden peas
Lamarck's theory


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 :

A : Evolution is the gradual change which takes place in
organisms over millions of years and new species are
produced.
R : Heredity is the transmission of characters or traits from
parents to offsprings.


Answer :

Both "A' and 'R' are true and 'R' is the correct explanation of A.
Both 'A' and 'R' are true but 'R" is not the correct explanation of "A'.
'A' is false but 'R' is true
Both 'A' and 'R' are false.


Question :

Which of the following statements is not true with respect
to variation ?


Answer :

All variations in a species have equal chance of surviva
Change in genetic composition results in variation
Selection of variants by environmental factors forms the basis of evolutionary processes.
Variation is minimum in asexual reproduction


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 :

Fingers in humans are an example of


Answer :

Adaptation
Specialisation
Variation
Inheritance