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Free download in PDF CBSE Class 8 Science Short Questions & Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE class 8 Students.
41
The male hormone is
[A]
Estragon
[B]
Projestrone
[C]
Testosterone
[D]
All of these
42
The number of chromosomes are present in human cell.
[A]
22 pairs
[B]
23 pairs
[C]
24 parirs
[D]
26 pairs
43
Puberty age in females is
[A]
10-12
[B]
8-10
[C]
12-14
[D]
More than 14 years
44
Fertilisation is called
[A]
To produce sperm
[B]
To produce eggs
[C]
Fusion of sperms and eggs
[D]
All of these
Answer: Fusion of sperms and eggs
45
The period of maturity of reproductive organs is called.
[A]
Adolescene period
[B]
Mensuration
[C]
Gestation period
[D]
None of these
Answer: Adolescene period
46
Initially girls grow _____ than boys.
[A]
Faster
[B]
Slower
[C]
Both of these
[D]
None of these
47
There are__ __ pairs of chromosome in human cell.
[A]
23
[B]
22
[C]
46
[D]
All are wrong
48
Thyroxin produced by
[A]
Pituitary gland
[B]
Adrenal gland
[C]
Thyroid gland
[D]
Testes
49
The egg is
[A]
Egg gamete
[B]
Female gamete
[C]
Both of these
[D]
None of these
50
Larynx is called
[A]
Voice box
[B]
Respiratory organ
[C]
Music box
[D]
None of these
51
The charge acquired by a glass rod when it is rubbed with silk is
[A]
Negative
[B]
Positive
[C]
Both
[D]
None
52
Benjamen Franklin showed lightening in
[A]
1725
[B]
1527
[C]
1752
[D]
1572
53
Sparkers can be seen on electric pole. Which wires become
[A]
Loose
[B]
Wrinkle
[C]
Tight
[D]
None
54
Interaction of charges is called
[A]
Lightening
[B]
Electrical discharge
[C]
Earthing
[D]
Electricity
55
Lightening occurs due to
[A]
Electric discharge
[B]
Rain
[C]
Wind
[D]
Lord Varun�s anger
Answer: Electric discharge
56
The shaking of earth is called
[A]
Tsunami
[B]
Volcano
[C]
Earthquake
[D]
All of these
57
The like charges
[A]
Repel each other
[B]
Attract each other
[C]
No interaction takes place
[D]
All of these
58
Name the resin which produces spark is
[A]
Gum
[B]
Amber
[C]
Both A and B
[D]
None of these
59
An electric lamp glows due to
[A]
Chemical effect
[B]
Magnetic effect
[C]
Heating effect
[D]
None
60
Electroplating prevents
[A]
Current
[B]
Chemical effect
[C]
Rusting
[D]
All
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