Q. Which type of pollination occurs when pollen is transferred from the anther to the stigma of the same flower? (2021)
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A.
Cross-pollination
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B.
Self-pollination
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C.
Wind pollination
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D.
Insect pollination
Solution
Self-pollination occurs when pollen is transferred from the anther to the stigma of the same flower.
Correct Answer: B — Self-pollination
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Q. Which type of pollination occurs within the same flower? (2021)
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A.
Cross-pollination
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B.
Self-pollination
-
C.
Wind pollination
-
D.
Insect pollination
Solution
Self-pollination occurs when pollen from the anther of a flower fertilizes the ovule of the same flower.
Correct Answer: B — Self-pollination
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Q. Which type of radiation consists of helium nuclei?
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A.
Alpha radiation
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B.
Beta radiation
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C.
Gamma radiation
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D.
X-rays
Solution
Alpha radiation consists of helium nuclei, which are emitted during certain types of radioactive decay.
Correct Answer: A — Alpha radiation
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Q. Which type of radiation has the highest penetrating power? (2019)
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A.
Alpha particles
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B.
Beta particles
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C.
Gamma rays
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D.
Neutrons
Solution
Gamma rays have the highest penetrating power among the types of radiation, able to pass through most materials.
Correct Answer: C — Gamma rays
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Q. Which type of reproduction involves the fusion of gametes? (2022)
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A.
Asexual reproduction
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B.
Vegetative propagation
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C.
Sexual reproduction
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D.
Budding
Solution
Sexual reproduction involves the fusion of male and female gametes to form a zygote.
Correct Answer: C — Sexual reproduction
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Q. Which type of reproduction is characterized by the formation of a new organism from a part of the parent organism? (2023)
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A.
Budding
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B.
Binary fission
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C.
Fragmentation
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D.
All of the above
Solution
All of the mentioned methods (budding, binary fission, and fragmentation) involve the formation of new organisms from parts of the parent.
Correct Answer: D — All of the above
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Q. Which type of reproduction is most common in fungi? (2023)
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A.
Asexual reproduction
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B.
Sexual reproduction
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C.
Both asexual and sexual reproduction
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D.
None of the above
Solution
Fungi can reproduce both asexually (through spores) and sexually (through the fusion of hyphae).
Correct Answer: C — Both asexual and sexual reproduction
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Q. Which type of reproduction is most common in unicellular organisms? (2019)
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A.
Sexual reproduction
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B.
Asexual reproduction
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C.
Budding
-
D.
Fragmentation
Solution
Asexual reproduction is most common in unicellular organisms, allowing for rapid population growth.
Correct Answer: B — Asexual reproduction
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Q. Which type of reproduction is most likely to occur in stable environments? (2023)
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A.
Asexual reproduction
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B.
Sexual reproduction
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C.
Budding
-
D.
Fragmentation
Solution
Asexual reproduction is favored in stable environments as it allows for rapid population increase without the need for mates.
Correct Answer: A — Asexual reproduction
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Q. Which type of reproduction results in offspring that are genetically identical to the parent? (2022)
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A.
Asexual reproduction
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B.
Sexual reproduction
-
C.
Both asexual and sexual reproduction
-
D.
None of the above
Solution
Asexual reproduction results in offspring that are genetically identical to the parent organism.
Correct Answer: A — Asexual reproduction
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Q. Which type of root system is characteristic of monocots? (2020)
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A.
Tap root system
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B.
Fibrous root system
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C.
Adventitious root system
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D.
Lateral root system
Solution
Monocots typically have a fibrous root system, which consists of many thin roots that spread out.
Correct Answer: B — Fibrous root system
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Q. Which type of root system is characterized by a single main root with smaller lateral roots? (2020)
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A.
Fibrous root system
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B.
Tap root system
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C.
Adventitious root system
-
D.
Modified root system
Solution
A tap root system is characterized by a single main root that grows deeper into the soil with smaller lateral roots.
Correct Answer: B — Tap root system
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Q. Which type of satellite orbit is best for monitoring weather patterns?
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A.
Geostationary orbit
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B.
Polar orbit
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C.
Elliptical orbit
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D.
Low Earth orbit
Solution
Geostationary satellites are ideal for monitoring weather patterns as they provide a constant view of the same area.
Correct Answer: A — Geostationary orbit
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Q. Which type of satellite orbit is best for weather monitoring?
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A.
Geostationary orbit
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B.
Polar orbit
-
C.
Elliptical orbit
-
D.
Low Earth orbit
Solution
Geostationary orbits are ideal for weather monitoring as they provide a constant view of the same area of the Earth.
Correct Answer: A — Geostationary orbit
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Q. Which type of semiconductor has a higher concentration of holes? (2023)
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A.
N-type
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B.
P-type
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C.
Intrinsic
-
D.
Extrinsic
Solution
P-type semiconductors have a higher concentration of holes compared to N-type semiconductors.
Correct Answer: B — P-type
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Q. Which type of semiconductor has an excess of electrons?
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A.
P-type
-
B.
N-type
-
C.
Intrinsic
-
D.
Extrinsic
Solution
N-type semiconductors have an excess of electrons due to the addition of donor impurities.
Correct Answer: B — N-type
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Q. Which type of semiconductor is formed by doping silicon with phosphorus? (2020)
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A.
p-type
-
B.
n-type
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C.
Intrinsic
-
D.
Superconducting
Solution
Doping silicon with phosphorus creates an n-type semiconductor due to the addition of extra electrons.
Correct Answer: B — n-type
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Q. Which type of solid has a definite melting point and is composed of molecules held together by van der Waals forces? (2022)
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A.
Ionic solid
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B.
Metallic solid
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C.
Molecular solid
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D.
Covalent solid
Solution
Molecular solids are composed of molecules held together by van der Waals forces and have a definite melting point.
Correct Answer: C — Molecular solid
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Q. Which type of solid has a definite melting point and is usually hard and brittle? (2022)
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A.
Molecular solids
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B.
Ionic solids
-
C.
Metallic solids
-
D.
Amorphous solids
Solution
Ionic solids have a definite melting point and are typically hard and brittle due to the strong ionic bonds between the ions.
Correct Answer: B — Ionic solids
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Q. Which type of solid has a definite melting point? (2022)
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A.
Amorphous solid
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B.
Crystalline solid
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C.
Polymeric solid
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D.
Metallic solid
Solution
Crystalline solids have a definite melting point due to their ordered structure, unlike amorphous solids which melt over a range of temperatures.
Correct Answer: B — Crystalline solid
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Q. Which type of solution does Raoult's Law apply to most accurately?
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A.
Ideal solutions
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B.
Non-ideal solutions
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C.
Concentrated solutions
-
D.
Dilute solutions
Solution
Raoult's Law applies most accurately to ideal solutions, where interactions between different molecules are similar to those in pure substances.
Correct Answer: A — Ideal solutions
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Q. Which type of tissue is responsible for movement in animals? (2019)
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A.
Epithelial Tissue
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B.
Connective Tissue
-
C.
Muscle Tissue
-
D.
Nervous Tissue
Solution
Muscle tissue is responsible for movement in animals.
Correct Answer: C — Muscle Tissue
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Q. Which type of tissue is responsible for the movement of the body? (2021)
-
A.
Epithelial Tissue
-
B.
Connective Tissue
-
C.
Muscle Tissue
-
D.
Nervous Tissue
Solution
Muscle tissue is responsible for the movement of the body.
Correct Answer: C — Muscle Tissue
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Q. Which type of white blood cell is primarily involved in the immune response? (2019)
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A.
Erythrocytes
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B.
Neutrophils
-
C.
Thrombocytes
-
D.
Lymphocytes
Solution
Lymphocytes are a type of white blood cell that plays a key role in the immune response.
Correct Answer: D — Lymphocytes
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Q. Which vitamin can be synthesized by the body when exposed to sunlight?
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A.
Vitamin A
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B.
Vitamin B12
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C.
Vitamin C
-
D.
Vitamin D
Solution
Vitamin D can be synthesized by the body when the skin is exposed to sunlight.
Correct Answer: D — Vitamin D
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Q. Which vitamin deficiency can lead to night blindness?
-
A.
Vitamin A
-
B.
Vitamin B12
-
C.
Vitamin C
-
D.
Vitamin D
Solution
A deficiency in Vitamin A can lead to night blindness, as it is crucial for maintaining healthy vision.
Correct Answer: A — Vitamin A
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Q. Which vitamin deficiency can lead to scurvy?
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A.
Vitamin A
-
B.
Vitamin C
-
C.
Vitamin K
-
D.
Vitamin B1
Solution
A deficiency in Vitamin C can lead to scurvy, characterized by symptoms such as bleeding gums and fatigue.
Correct Answer: B — Vitamin C
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Q. Which vitamin deficiency leads to scurvy? (2019)
-
A.
Vitamin A
-
B.
Vitamin B12
-
C.
Vitamin C
-
D.
Vitamin D
Solution
Scurvy is caused by a deficiency of Vitamin C.
Correct Answer: C — Vitamin C
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Q. Which vitamin is a coenzyme in the metabolism of carbohydrates? (2019)
-
A.
Vitamin A
-
B.
Vitamin B1
-
C.
Vitamin C
-
D.
Vitamin D
Solution
Vitamin B1 (thiamine) acts as a coenzyme in carbohydrate metabolism.
Correct Answer: B — Vitamin B1
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Q. Which vitamin is a powerful antioxidant?
-
A.
Vitamin A
-
B.
Vitamin C
-
C.
Vitamin E
-
D.
Vitamin D
Solution
Vitamin E is known for its antioxidant properties, helping to protect cells from oxidative damage.
Correct Answer: C — Vitamin E
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