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Free download in PDF CBSE class 9 Science Quiz and Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE class 9 Students.
161
Apiculture deals with
[A]
Bee Keeping
[B]
Rearing Silk Moths
[C]
Rearing Pigs
[D]
Rearing Cows and Buffaloes
162
Which of the following is not a type of biotic stress?
[A]
frost
[B]
nematodes
[C]
diseases
[D]
insect
163
Which is the oldest breeding method?
[A]
selection
[B]
introduction
[C]
hybridization
[D]
mutation
164
Which of the following is an incorrect statement regarding improvement in crop production?
[A]
Tallness is desired in cereals.
[B]
Profuse branching is good for fodder crops
[C]
Variety resistance to biotic stress is a good factor to improve crops.
[D]
Shorter duration of crop from sowing to harvesting is better option.
Answer: Tallness is desired in cereals.
165
Which of the following is not included in 'organic farming'?
[A]
chemical fertilizers
[B]
green manures
[C]
compost and vermi-compost
[D]
crop rotation
Answer: chemical fertilizers
166
Cereals largely fulfill which of the following energy requirement?
[A]
Carbohydrates
[B]
Minerals
[C]
Proteins
[D]
Node
167
Which one of the following species of honey bee is an Italian species?
[A]
Apis mellifera
[B]
Apis cerana indica
[C]
Apis dorsata
[D]
Apis florae
168
Which one is not a source of carbohydrate?
[A]
Gram
[B]
Sorghum
[C]
Rice
[D]
Millets
169
The SI unit of wavelength is
[A]
metre
[B]
s-1
[C]
metre/second
[D]
Hertz
170
What type of sound waves can propagate in solids ?
[A]
Longitudinal only
[B]
Transverse only
[C]
Either longitudinal or transverse
[D]
Non mechanical waves only
Answer: Either longitudinal or transverse
171
The force of attraction between two bodies (each having mass of 1kg) are kept at a distance of 1m w.r.t. each other is:
[A]
6.7 x 10 -11 N
[B]
980 N
[C]
9.8 N
[D]
6.7 N
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