Q. Which of the following is an example of a sex-linked trait? (2019)
A.
Color blindness
B.
Height
C.
Seed shape
D.
Flower color
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Solution
Color blindness is a sex-linked trait, primarily located on the X chromosome, affecting males more frequently than females.
Correct Answer: A — Color blindness
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Q. Which of the following is an example of a substance in the plasma state? (2023)
A.
Water
B.
Oxygen gas
C.
Lightning
D.
Ice
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Solution
Plasma is a state of matter where gases are energized until atomic electrons are no longer associated with the nucleus, as seen in lightning.
Correct Answer: C — Lightning
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Q. Which of the following is an example of a synthetic detergent?
A.
Soap
B.
Sodium lauryl sulfate
C.
Glycerin
D.
Sodium bicarbonate
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Solution
Sodium lauryl sulfate is a synthetic detergent commonly used in personal care products.
Correct Answer: B — Sodium lauryl sulfate
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Q. Which of the following is an example of a synthetic polymer?
A.
Rubber
B.
Silk
C.
Polyvinyl chloride (PVC)
D.
Starch
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Solution
Polyvinyl chloride (PVC) is a synthetic polymer widely used in construction and plumbing.
Correct Answer: C — Polyvinyl chloride (PVC)
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Q. Which of the following is an example of a tertiary consumer? (2023)
A.
Grass
B.
Rabbit
C.
Fox
D.
Eagle
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Solution
An eagle is an example of a tertiary consumer as it feeds on secondary consumers like foxes.
Correct Answer: D — Eagle
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Q. Which of the following is an example of a vestigial structure? (2021)
A.
Human appendix
B.
Whale flippers
C.
Bird wings
D.
Insect wings
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Solution
The human appendix is considered a vestigial structure, as it has lost its original function over the course of evolution.
Correct Answer: A — Human appendix
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Q. Which of the following is an example of adaptive radiation? (1970)
A.
The evolution of different species of finches in the Galapagos Islands
B.
The development of antibiotic resistance in bacteria
C.
The color variations in peppered moths
D.
The fossil record of horses
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Solution
Adaptive radiation refers to the rapid evolution of diversely adapted species from a common ancestor, exemplified by the finches in the Galapagos Islands.
Correct Answer: A — The evolution of different species of finches in the Galapagos Islands
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Q. Which of the following is an example of an adiabatic process?
A.
Heating water in a kettle
B.
Compressing a gas in a piston without heat exchange
C.
Cooling a gas in a refrigerator
D.
Heating a metal rod in a flame
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Solution
An adiabatic process is one in which no heat is exchanged with the surroundings. Compressing a gas in a piston without heat exchange is an example.
Correct Answer: B — Compressing a gas in a piston without heat exchange
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Q. Which of the following is an example of an alkane? (2023)
A.
C2H4
B.
C3H8
C.
C4H6
D.
C5H10
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Solution
Alkanes are saturated hydrocarbons with the general formula CnH2n+2. C3H8 (propane) fits this formula.
Correct Answer: B — C3H8
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Q. Which of the following is an example of an alkene? (2023)
A.
Ethane
B.
Propene
C.
Butane
D.
Cyclohexane
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Solution
Propene is an alkene, characterized by a carbon-carbon double bond.
Correct Answer: B — Propene
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Q. Which of the following is an example of an alkene? (2023) 2023
A.
Ethane
B.
Propene
C.
Butane
D.
Cyclohexane
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Solution
Propene is an alkene, characterized by a carbon-carbon double bond.
Correct Answer: B — Propene
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Q. Which of the following is an example of an alkyne?
A.
Ethane
B.
Propene
C.
Butyne
D.
Benzene
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Solution
Butyne is an alkyne, characterized by a triple bond between carbon atoms.
Correct Answer: C — Butyne
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Q. Which of the following is an example of an antibiotic?
A.
Aspirin
B.
Penicillin
C.
Ibuprofen
D.
Paracetamol
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Solution
Penicillin is a well-known antibiotic used to treat bacterial infections.
Correct Answer: B — Penicillin
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Q. Which of the following is an example of an endothermic process? (2021)
A.
Combustion of gasoline
B.
Dissolving ammonium nitrate in water
C.
Respiration
D.
Condensation of steam
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Solution
Dissolving ammonium nitrate in water absorbs heat, making it an endothermic process.
Correct Answer: B — Dissolving ammonium nitrate in water
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Q. Which of the following is an example of an endothermic reaction?
A.
Respiration
B.
Photosynthesis
C.
Combustion
D.
Neutralization
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Solution
Photosynthesis is an endothermic process as it absorbs energy from sunlight.
Correct Answer: B — Photosynthesis
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Q. Which of the following is an example of an input device? (2020)
A.
Monitor
B.
Keyboard
C.
Printer
D.
Speaker
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Solution
A keyboard is an example of an input device, as it allows users to input data into the computer.
Correct Answer: B — Keyboard
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Q. Which of the following is an example of an input/output device? (2023)
A.
Scanner
B.
Monitor
C.
Keyboard
D.
Mouse
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Solution
A scanner is an input/output device that can capture images and send them to a computer while also allowing for output in the form of printed documents.
Correct Answer: A — Scanner
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Q. Which of the following is an example of an insulator? (2019)
A.
Copper
B.
Aluminum
C.
Rubber
D.
Iron
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Solution
Rubber is an example of an insulator.
Correct Answer: C — Rubber
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Q. Which of the following is an example of an oxidation reaction? (2020)
A.
2H2 + O2 → 2H2O
B.
C + O2 → CO2
C.
Fe + CuSO4 → FeSO4 + Cu
D.
Na + Cl2 → NaCl
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Solution
In the reaction C + O2 → CO2, carbon is oxidized as it loses electrons to form CO2.
Correct Answer: B — C + O2 → CO2
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Q. Which of the following is an example of artificial selection? (1995)
A.
Pesticide resistance in insects
B.
Dog breeding
C.
Peppered moth color variation
D.
Antibiotic resistance in bacteria
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Solution
Dog breeding is an example of artificial selection, where humans selectively breed animals for desired traits.
Correct Answer: B — Dog breeding
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Q. Which of the following is an example of chain isomerism?
A.
Pentane and 2-methylbutane
B.
Butene and Butyne
C.
Ethanol and Dimethyl ether
D.
Acetic acid and Propanoic acid
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Solution
Pentane and 2-methylbutane differ in the arrangement of carbon atoms, thus showing chain isomerism.
Correct Answer: A — Pentane and 2-methylbutane
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Q. Which of the following is an example of cis-trans isomerism?
A.
1-pentene
B.
2-pentene
C.
3-pentene
D.
Cyclopentane
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Solution
2-pentene can exist in cis and trans forms due to the presence of a double bond.
Correct Answer: B — 2-pentene
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Q. Which of the following is an example of conduction?
A.
Boiling water
B.
Heating a metal rod
C.
Sun warming the Earth
D.
Wind blowing
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Solution
Heating a metal rod is an example of conduction, where heat is transferred through direct contact between particles.
Correct Answer: B — Heating a metal rod
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Q. Which of the following is an example of convection?
A.
Heating a metal rod in a flame
B.
Boiling water in a pot
C.
Sunlight warming the ground
D.
Ice melting in a drink
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Solution
Boiling water in a pot is a classic example of convection, where hot water rises and cooler water descends.
Correct Answer: B — Boiling water in a pot
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Q. Which of the following is an example of convergent evolution? (1980)
A.
Darwin's finches
B.
Whales and fish
C.
Horses and zebras
D.
Dogs and wolves
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Solution
Convergent evolution occurs when unrelated species evolve similar traits, as seen in whales and fish, which both have streamlined bodies for swimming.
Correct Answer: B — Whales and fish
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Q. Which of the following is an example of divergent evolution?
A.
Wings of bats and birds
B.
Body shape of dolphins and sharks
C.
Darwin's finches
D.
Cacti and succulents
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Solution
Darwin's finches are an example of divergent evolution, where different species evolved from a common ancestor and adapted to different environments.
Correct Answer: C — Darwin's finches
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Q. Which of the following is an example of ex-situ conservation? (2023)
A.
National parks
B.
Wildlife reserves
C.
Aquariums
D.
Biosphere reserves
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Solution
Aquariums are an example of ex-situ conservation as they involve the conservation of species outside their natural habitats.
Correct Answer: C — Aquariums
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Q. Which of the following is an example of figural memory? (2020)
A.
Remembering a friend's birthday
B.
Recalling the capital of a country
C.
Recognizing a face in a crowd
D.
Knowing the rules of a game
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Solution
Figural memory involves the ability to recognize and recall visual images, such as faces.
Correct Answer: C — Recognizing a face in a crowd
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Q. Which of the following is an example of forced convection?
A.
Heat transfer in a pot of boiling water
B.
Heat transfer from a radiator
C.
Heat transfer from a hot cup of coffee
D.
Heat transfer in a still air room
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Solution
Heat transfer in a pot of boiling water is an example of forced convection.
Correct Answer: B — Heat transfer from a radiator
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Q. Which of the following is an example of fragmentation? (2023)
A.
Starfish
B.
Bacteria
C.
Fungi
D.
All of the above
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Solution
Starfish can reproduce through fragmentation, where a part of the organism breaks off and develops into a new individual.
Correct Answer: A — Starfish
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