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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 :

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 these is homozygous recessive ?


Answer :

s
ss
Ss
SS


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 :

A : Closely related species have few characteristics in
common.
B : Interbreeding among individuals of different
populations of a species maintains a free flow of genes
in these populations.


Answer :

'A' Right, 'B' Right
'A' Right, 'B' Wrong
A' Wrong, 'B' Right
'A' Wrong, 'B' Wrong


Question :

Answer :



Question :

A : Equal distribution of genes occurs because these genes
are located on pairs of homologous chromosomes.
B : Acquired variations in somatic traits are not passed
from generation to generation.


Answer :

Both 'A' and 'B' are true statements.
Both 'A' and 'B' are false statements.
A' is true while 'B' is false.
A' is false while 'B' is true.


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 :

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


Answer :

Mendel
Lamarck
Weismann
Whittaker


Question :

The sequence of events in geographic speciation is most
likely to be :


Answer :

Reproductive isolation
Geographic barrier
Genetic divergence
Genetic divergence


Question :

A Mendelian experiment consists in breeding tall pea plants
bearing violet flowers with short pea plants bearing white
flowers. The progeny all bore violet flowers, but almost
half of them are short. This suggests that the genetic makeup
of the tall parent can be depicted as - [NCERT]


Answer :

TTWW
TTww
TtWW
TtWw