CBSE Class 10 Science Worksheet
Unit II: World of Living - Heredity and Evolution
1.
State True or False: Nature of hair can be acquired but not inherited.
A)
TRUE
B)
FALSE
2.
A tall pea plant (X)is crossed with a dwarf pea plant and all the F1 progenies are tall. What is the genotype of X?
A)
TT
B)
Tt
C)
tt
D)
Cannot tell
3.
Choose the correct answer: The probability of getting either a male or a female child is ______________.
A)
1/2
B)
1/4
C)
1/3
D)
2/3
4.
When a homozygous tall (TT) plant is crossed with a homozygous short (tt) plant, what is the percentage of tall plants in F1 progeny?
A)
50%
B)
100%
C)
25%
D)
75%
5.
State True or False: Human teeth and elephant's tusk are homologous organs.
A)
TRUE
B)
FALSE
6.
Choose the correct answer: The formation of new species due to gradual change over long period of time is known as _________________.
A)
Evolution
B)
Progression
C)
Domination
D)
Speciation
7.
State True or False: A trait may be inherited as well as expressed.
A)
TRUE
B)
FALSE
8.
State True or False: Asexually reproducing organisms will show more variations as compared to sexually reproducing organisms.
A)
TRUE
B)
FALSE
9.
Why was pea plant chosen by Mendel for his experiments?
10.
A round yellow (RRYY) pea plant and green wrinkled (rryy) pea plant is crossed. The F1 progeny RrYy are selfed. What is the ratio of round green pea plant in F2 progeny?
A)
9/16
B)
1/16
C)
5/16
D)
3/16
11.
If genes B in humans gives brown eyes and gene b gives blue eyes, then the combination Bb gives which type of eyes?
A)
Blue
B)
Brown
C)
Either brown or blue
D)
None of these
12.
Choose the correct answer: The development of new types of organisms from the existing ones is known as _________________.
A)
Evolution
B)
Progression
C)
Domination
D)
Speciation
13.
How are variant genotypes produced?
14.
How many chromosomes are there in the gametes of the human female?
A)
One
B)
Two
C)
Three
D)
Four
15.
Fill in the blanks: The method which uses carbon for studying fossil fuels is _____________.
16.
Choose the correct answer: The branch of biology that deals with the study of heredity and evolution is _____________.
A)
Genetics
B)
Pathology
C)
Botany
D)
None of these
17.
State True or False: For the production of every enzyme there is a gene.
A)
TRUE
B)
FALSE
18.
which of these is an example of an acquired trait?
A)
strong muscles
B)
brown hair
C)
fair skin
D)
long nose
19.
Choose the correct answer: Heredity material of retrovirus is ____________________.
A)
RNA
B)
DNA
C)
Lipids
D)
Proteins
20.
Fill in the blanks: The organisms that contain a segment of foreign DNA are known as ____________ organisms.
CBSE Class 10 Science Worksheet
Unit II: World of Living - Heredity and Evolution
Answers
1.
Option B
2.
Option A
3.
Option A
4.
Option B
5.
Option A
6.
Option D
7.
Option B
8.
Option B
9.
(i) Easy to grow (ii) Short life span (iii) Easily distinguishable characters (iv) Self-pollinated
10.
Option D
11.
Option B
12.
Option A
13.
(i) Mutation in genes and chromosomes (ii) Recombination of genes (iii) Hybridization of genes
14.
Option B
15.
Carbon dating
16.
Option A
17.
Option A
18.
Option A
19.
Option A
20.
Transgenic
