CBSE class 9 Science Quiz | CBSE class 9 Science Quiz and Answers

Questions
161 Apiculture deals with
A Bee Keeping
B Rearing Silk Moths
C Rearing Pigs
D Rearing Cows and Buffaloes

Answer: Bee Keeping
162 Which of the following is not a type of biotic stress?
A frost
B nematodes
C diseases
D insect

Answer: frost
163 Which is the oldest breeding method?
A selection
B introduction
C hybridization
D mutation

Answer: introduction
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

Answer: Carbohydrates
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

Answer: Apis mellifera
168 Which one is not a source of carbohydrate?
A Gram
B Sorghum
C Rice
D Millets

Answer: Gram
169 The SI unit of wavelength is
A metre
B s-1
C metre/second
D Hertz

Answer: metre
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

Answer: 6.7 x 10 -11 N
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