Welcome to cbsenotes.com! To post messages or access any member only section, you will need an account. Create your free account now.
Already a member ? Click here to login
CBSE Notes 2011-2012 » Heredity and Evolution - Class 10 Biology MCQs (Free Practice Test)

Heredity and Evolution - Class 10 Biology MCQs (Free Practice Test)


************************************************
A select subset of questions has been made available here.
You can use this for preparation purpose.
Once you are ready, click on 'Take Quiz' to start the QUIZ.
***********************************************

Question :

Which of the following pairs of organs is analogous to each
other ?


Answer :

Leaf spines and leaf tendrils
Flipper of a whale and leg of a horse
Wings of an insect and wings of a bat
Forelimbs of a frog and human hand Heredity


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 :

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 :

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 :

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 :

If a round, green seeded pea plant (RR yy) is crossed with
wrinkled, yellow seeded pea plant, (rr YY) the seeds
produced in F1 generation are


Answer :

round and yellow
round and green
wrinkled and green
wrinkled and yellow


Question :

Two pea plants one with round green seeds (RRyy) and
another with wrinkled yellow (rrYY) seeds produce F1
progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination
of characters. Choose the new combination from the
following: (i) Round, yellow (ii)Round, green (iii) Wrinkled, yellow (iv)Wrinkled, green


Answer :

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


Question :

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


Answer :

one
two
three
four


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 :

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


Answer :

Protozoans
Reptiles
Arthropods
Coelenterates