Q. Which of the following is an example of ex-situ conservation? (2023)
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A.
National parks
-
B.
Wildlife reserves
-
C.
Aquariums
-
D.
Biosphere reserves
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 fragmentation? (2023)
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A.
Starfish
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B.
Bacteria
-
C.
Fungi
-
D.
All of the above
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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Q. Which of the following is an example of mutualism? (2021)
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A.
A lion hunting a zebra
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B.
Bees pollinating flowers
-
C.
A tick feeding on a dog
-
D.
A bird eating ticks off a cow
Solution
Mutualism is a symbiotic relationship where both species benefit, such as bees pollinating flowers.
Correct Answer: B — Bees pollinating flowers
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Q. Which of the following is an example of sexual reproduction? (2023)
-
A.
Budding in hydra
-
B.
Fission in amoeba
-
C.
Pollination in flowering plants
-
D.
Regeneration in planaria
Solution
Pollination in flowering plants is a key process in sexual reproduction, involving the transfer of pollen to fertilize ovules.
Correct Answer: C — Pollination in flowering plants
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Q. Which of the following is an example of sublimation? (2022)
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A.
Ice melting
-
B.
Dry ice turning into gas
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C.
Water boiling
-
D.
Salt dissolving in water
Solution
Sublimation is the process where a solid turns directly into a gas, as seen with dry ice (solid CO2).
Correct Answer: B — Dry ice turning into gas
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Q. Which of the following is an example of thermal expansion? (2021)
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A.
A balloon inflating when heated
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B.
Ice melting in water
-
C.
Water boiling
-
D.
A metal rod contracting in cold
Solution
A balloon inflating when heated is an example of thermal expansion, as the gas inside expands with increased temperature.
Correct Answer: A — A balloon inflating when heated
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Q. Which of the following is asexual reproduction? (2019)
-
A.
Budding in hydra
-
B.
Fertilization in frogs
-
C.
Pollination in flowering plants
-
D.
Binary fission in amoeba
Solution
Binary fission in amoeba is a form of asexual reproduction where a single organism divides into two.
Correct Answer: D — Binary fission in amoeba
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Q. Which of the following is known as the powerhouse of the cell? (2020)
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A.
Nucleus
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B.
Mitochondria
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C.
Ribosome
-
D.
Endoplasmic Reticulum
Solution
Mitochondria are known as the powerhouse of the cell because they produce ATP, the energy currency of the cell.
Correct Answer: B — Mitochondria
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Q. Which of the following is NOT a benefit of biodiversity? (2022)
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A.
Increased ecosystem productivity
-
B.
Stability of ecosystems
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C.
Reduction of disease
-
D.
Increased pollution
Solution
Increased pollution is not a benefit of biodiversity; rather, biodiversity helps in reducing pollution.
Correct Answer: D — Increased pollution
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Q. Which of the following is NOT a benefit of biotechnology in agriculture? (2020)
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A.
Increased crop yield
-
B.
Reduced pesticide use
-
C.
Enhanced food security
-
D.
Higher labor costs
Solution
Higher labor costs are not a benefit of biotechnology; in fact, biotechnology often aims to reduce labor costs through increased efficiency.
Correct Answer: D — Higher labor costs
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Q. Which of the following is NOT a benefit of biotechnology in medicine? (2020)
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A.
Production of monoclonal antibodies
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B.
Development of vaccines
-
C.
Creation of synthetic fertilizers
-
D.
Gene therapy
Solution
Creation of synthetic fertilizers is not a benefit of biotechnology in medicine; it is related to agricultural biotechnology.
Correct Answer: C — Creation of synthetic fertilizers
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Q. Which of the following is NOT a benefit of genetically modified crops? (2022)
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A.
Increased yield
-
B.
Reduced pesticide use
-
C.
Enhanced nutritional content
-
D.
Higher cost of production
Solution
Genetically modified crops are generally designed to reduce costs and increase yield, not to increase production costs.
Correct Answer: D — Higher cost of production
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Q. Which of the following is NOT a benefit of genetically modified organisms (GMOs)? (2022)
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A.
Increased resistance to pests
-
B.
Higher nutritional value
-
C.
Reduced agricultural yield
-
D.
Drought resistance
Solution
Reduced agricultural yield is not a benefit of GMOs; in fact, they are designed to increase yield and resilience.
Correct Answer: C — Reduced agricultural yield
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Q. Which of the following is NOT a benefit of using biotechnology in agriculture? (2022)
-
A.
Reduced pesticide use
-
B.
Increased resistance to diseases
-
C.
Higher production costs
-
D.
Enhanced nutritional content
Solution
Higher production costs are not a benefit of biotechnology; in fact, biotechnology aims to reduce costs.
Correct Answer: C — Higher production costs
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Q. Which of the following is NOT a biotechnological application in medicine? (2022)
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A.
Gene therapy
-
B.
Monoclonal antibodies
-
C.
Genetic engineering of crops
-
D.
Vaccines production
Solution
Genetic engineering of crops is primarily an agricultural application, not a direct medical application.
Correct Answer: C — Genetic engineering of crops
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Q. Which of the following is NOT a characteristic of a population? (2023)
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A.
Density
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B.
Birth rate
-
C.
Age structure
-
D.
Species diversity
Solution
Species diversity refers to the variety of species in an ecosystem, not a characteristic of a single population.
Correct Answer: D — Species diversity
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Q. Which of the following is NOT a characteristic of an ecosystem? (2021)
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A.
Energy flow
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B.
Nutrient cycling
-
C.
Static population
-
D.
Biotic and abiotic interactions
Solution
Ecosystems are dynamic and characterized by changing populations, not static populations.
Correct Answer: C — Static population
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Q. Which of the following is not a characteristic of an endothermic reaction? (2023)
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A.
Absorbs heat
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B.
Feels cold to the touch
-
C.
Releases heat
-
D.
Positive ΔH
Solution
Endothermic reactions absorb heat, feel cold, and have a positive ΔH; they do not release heat.
Correct Answer: C — Releases heat
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Q. Which of the following is NOT a characteristic of an exothermic reaction? (2019)
-
A.
Releases heat
-
B.
ΔH is negative
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C.
Temperature of the surroundings increases
-
D.
Absorbs energy from the surroundings
Solution
An exothermic reaction releases heat and has a negative ΔH. It causes the temperature of the surroundings to increase, not absorb energy.
Correct Answer: D — Absorbs energy from the surroundings
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Q. Which of the following is not a characteristic of an ideal solution? (2019)
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A.
Constant boiling point
-
B.
Obeys Raoult's law
-
C.
No heat change on mixing
-
D.
Variable composition
Solution
An ideal solution has a constant boiling point and obeys Raoult's law, while variable composition is not a characteristic.
Correct Answer: D — Variable composition
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Q. Which of the following is NOT a characteristic of crystalline solids? (2019)
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A.
Anisotropy
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B.
Definite melting point
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C.
Isotropy
-
D.
Long-range order
Solution
Crystalline solids exhibit anisotropy, meaning their properties vary with direction, while isotropy refers to uniform properties in all directions.
Correct Answer: C — Isotropy
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Q. Which of the following is not a characteristic of d-block elements? (2023)
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A.
Formation of complex ions
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B.
Variable oxidation states
-
C.
High ionization energies
-
D.
Good conductors of electricity
Solution
D-block elements typically have variable oxidation states and lower ionization energies compared to p-block elements.
Correct Answer: C — High ionization energies
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Q. Which of the following is NOT a characteristic of essential oils? (2021)
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A.
Volatile
-
B.
Non-polar
-
C.
Water-soluble
-
D.
Aromatic
Solution
Essential oils are typically non-water-soluble and are known for their volatile and aromatic properties.
Correct Answer: C — Water-soluble
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Q. Which of the following is NOT a characteristic of ionic solids? (2021)
-
A.
High melting point
-
B.
Electrical conductivity in solid state
-
C.
Brittleness
-
D.
Solubility in water
Solution
Ionic solids do not conduct electricity in the solid state; they conduct when melted or dissolved in water.
Correct Answer: B — Electrical conductivity in solid state
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Q. Which of the following is not a characteristic of life? (2023)
-
A.
Metabolism
-
B.
Homeostasis
-
C.
Adaptation
-
D.
Decay
Solution
Decay is not a characteristic of life; it is a process that occurs after death.
Correct Answer: D — Decay
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Q. Which of the following is NOT a characteristic of living organisms? (2020)
-
A.
Growth
-
B.
Reproduction
-
C.
Movement
-
D.
Inertia
Solution
Inertia is not a characteristic of living organisms; they exhibit growth, reproduction, and movement.
Correct Answer: D — Inertia
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Q. Which of the following is NOT a characteristic of polymers? (2023)
-
A.
High molecular weight
-
B.
Low melting point
-
C.
Viscoelasticity
-
D.
Solubility in water
Solution
Polymers typically have low solubility in water, especially synthetic ones.
Correct Answer: D — Solubility in water
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Q. Which of the following is NOT a characteristic of r-selected species? (2019)
-
A.
High fecundity
-
B.
Short lifespan
-
C.
Low parental investment
-
D.
Long gestation period
Solution
R-selected species are characterized by high fecundity and short lifespans, not long gestation periods.
Correct Answer: D — Long gestation period
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Q. Which of the following is NOT a characteristic of the phylum Echinodermata? (2022)
-
A.
Radial symmetry
-
B.
Water vascular system
-
C.
Presence of a notochord
-
D.
Tube feet
Solution
Echinodermata do not possess a notochord; this feature is characteristic of Chordata.
Correct Answer: C — Presence of a notochord
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Q. Which of the following is NOT a characteristic of the phylum Mollusca? (2022)
-
A.
Soft-bodied
-
B.
Presence of a shell
-
C.
Jointed legs
-
D.
Mantle
Solution
Phylum Mollusca is characterized by soft bodies, often with a shell, and a mantle, but they do not have jointed legs.
Correct Answer: C — Jointed legs
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