Q. Which of the following is NOT a characteristic of the phylum Porifera? (2023)
A.
Multicellular
B.
Presence of true tissues
C.
Aquatic habitat
D.
Filter feeders
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Solution
Porifera, or sponges, lack true tissues, which distinguishes them from other multicellular organisms.
Correct Answer: B — Presence of true tissues
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Q. Which of the following is not a characteristic of the plant kingdom? (2020)
A.
Eukaryotic cells
B.
Autotrophic nutrition
C.
Presence of chlorophyll
D.
Heterotrophic nutrition
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Solution
The plant kingdom is characterized by eukaryotic cells, autotrophic nutrition, and the presence of chlorophyll. Heterotrophic nutrition is not a characteristic of plants.
Correct Answer: D — Heterotrophic nutrition
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Q. Which of the following is not a component of DNA? (2018)
A.
Deoxyribose
B.
Phosphate group
C.
Ribose
D.
Nitrogenous base
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Solution
Ribose is not a component of DNA; it is found in RNA. DNA contains deoxyribose.
Correct Answer: C — Ribose
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Q. Which of the following is NOT a component of the cell theory? (2018)
A.
All living things are composed of cells
B.
Cells are the basic unit of life
C.
All cells arise from pre-existing cells
D.
Cells can arise spontaneously from non-living matter
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Solution
The cell theory states that all living things are composed of cells, cells are the basic unit of life, and all cells arise from pre-existing cells. Spontaneous generation is not part of the cell theory.
Correct Answer: D — Cells can arise spontaneously from non-living matter
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Q. Which of the following is NOT a condition for natural selection to occur?
A.
Variation in traits
B.
Inheritance of traits
C.
Overproduction of offspring
D.
Uniformity of traits
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Solution
Uniformity of traits is not a condition for natural selection; rather, variation in traits is essential for natural selection to act upon.
Correct Answer: D — Uniformity of traits
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Q. Which of the following is NOT a derived unit? (2023)
A.
Newton
B.
Joule
C.
Kilogram
D.
Pascal
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Solution
Kilogram is a fundamental unit, while Newton, Joule, and Pascal are derived units.
Correct Answer: C — Kilogram
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Q. Which of the following is not a domain in the three-domain system? (2022)
A.
Bacteria
B.
Eukarya
C.
Archaea
D.
Fungi
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Solution
Fungi is not a domain; it is a kingdom within the domain Eukarya.
Correct Answer: D — Fungi
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Q. Which of the following is not a domain of life? (2022)
A.
Bacteria
B.
Archaea
C.
Eukarya
D.
Viruses
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Solution
Viruses are not classified as a domain of life.
Correct Answer: D — Viruses
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Q. Which of the following is NOT a factor that can lead to evolution? (2020)
A.
Natural Selection
B.
Genetic Drift
C.
Environmental Stability
D.
Mutation
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Solution
Environmental Stability does not lead to evolution; rather, it is the changes in the environment that drive evolutionary processes.
Correct Answer: C — Environmental Stability
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Q. Which of the following is not a feature of the kingdom Protista? (2021)
A.
Eukaryotic
B.
Unicellular or multicellular
C.
Photosynthetic or heterotrophic
D.
Cell wall made of chitin
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Solution
Protista do not have a cell wall made of chitin; this is characteristic of fungi.
Correct Answer: D — Cell wall made of chitin
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Q. Which of the following is not a form of energy? (2020)
A.
Kinetic Energy
B.
Potential Energy
C.
Thermal Energy
D.
Magnetic Field
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Solution
Magnetic field is not a form of energy; it is a field that exerts a force on charged particles.
Correct Answer: D — Magnetic Field
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Q. Which of the following is NOT a function of blood? (2023)
A.
Transporting gases
B.
Regulating body temperature
C.
Producing hormones
D.
Transporting nutrients
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Solution
While blood plays many roles, it does not produce hormones; hormones are produced by glands in the endocrine system.
Correct Answer: C — Producing hormones
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Q. Which of the following is NOT a function of connective tissue? (2022)
A.
Support
B.
Protection
C.
Secretion
D.
Transport
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Solution
Secretion is primarily a function of epithelial tissue, not connective tissue.
Correct Answer: C — Secretion
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Q. Which of the following is NOT a function of cytokinins? (2019)
A.
Promoting cell division
B.
Delaying leaf senescence
C.
Stimulating root growth
D.
Promoting apical dominance
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Solution
Cytokinins do not promote apical dominance; rather, they promote lateral bud growth.
Correct Answer: D — Promoting apical dominance
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Q. Which of the following is NOT a function of iron in plants? (2022)
A.
Chlorophyll synthesis
B.
Electron transport
C.
Cell wall formation
D.
Enzyme activation
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Solution
Iron is not directly involved in cell wall formation; it primarily functions in chlorophyll synthesis and electron transport.
Correct Answer: C — Cell wall formation
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Q. Which of the following is not a function of living organisms? (2023)
A.
Metabolism
B.
Reproduction
C.
Photosynthesis
D.
Inactivity
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Solution
Inactivity is not a function of living organisms; they are characterized by metabolic activity.
Correct Answer: D — Inactivity
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Q. Which of the following is NOT a function of magnesium in plants? (2023)
A.
Chlorophyll formation
B.
Enzyme activation
C.
Water transport
D.
Nutrient uptake
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Solution
Magnesium is not directly involved in water transport; it primarily aids in chlorophyll formation and enzyme activation.
Correct Answer: C — Water transport
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Q. Which of the following is NOT a function of nitrogen in plants? (2023)
A.
Protein synthesis
B.
Photosynthesis
C.
Nucleic acid formation
D.
Chlorophyll production
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Solution
While nitrogen is essential for protein synthesis, nucleic acids, and chlorophyll production, it does not directly participate in the photosynthesis process.
Correct Answer: B — Photosynthesis
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Q. Which of the following is NOT a function of stems in flowering plants? (2022)
A.
Support
B.
Transport of nutrients
C.
Photosynthesis
D.
Water absorption
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Solution
Stems primarily support the plant, transport nutrients and water, but do not absorb water; this is the function of roots.
Correct Answer: D — Water absorption
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Q. Which of the following is NOT a function of the cell membrane? (2022)
A.
Transport of materials
B.
Cell communication
C.
Energy production
D.
Barrier to external environment
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Solution
The cell membrane does not produce energy; it primarily functions in transport, communication, and acting as a barrier.
Correct Answer: C — Energy production
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Q. Which of the following is NOT a function of the endoplasmic reticulum? (2022)
A.
Protein synthesis
B.
Lipid synthesis
C.
Detoxification
D.
Photosynthesis
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Solution
Photosynthesis is not a function of the endoplasmic reticulum; it occurs in chloroplasts.
Correct Answer: D — Photosynthesis
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Q. Which of the following is not a function of the liver in digestion? (2022)
A.
Production of bile
B.
Detoxification
C.
Storage of glucose
D.
Digestion of proteins
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Solution
The liver does not directly digest proteins; it produces bile and performs other functions.
Correct Answer: D — Digestion of proteins
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Q. Which of the following is not a function of the liver? (2022)
A.
Detoxification
B.
Bile production
C.
Protein synthesis
D.
Digestion of carbohydrates
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Solution
The liver does not directly digest carbohydrates; it plays roles in detoxification, bile production, and protein synthesis.
Correct Answer: D — Digestion of carbohydrates
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Q. Which of the following is NOT a function of the muscular system? (2020)
A.
Maintaining posture
B.
Generating heat
C.
Transporting oxygen
D.
Facilitating movement
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Solution
Transporting oxygen is primarily the function of the circulatory system, not the muscular system.
Correct Answer: C — Transporting oxygen
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Q. Which of the following is NOT a function of the plasma membrane? (2019)
A.
Transport of materials
B.
Cell communication
C.
Energy production
D.
Barrier to external environment
Show solution
Solution
The plasma membrane does not produce energy; it primarily functions as a barrier and facilitates transport and communication.
Correct Answer: C — Energy production
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Q. Which of the following is NOT a function of the skeletal system? (2020)
A.
Support
B.
Movement
C.
Blood cell production
D.
Hormone secretion
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Solution
The skeletal system does not secrete hormones; this function is primarily associated with the endocrine system.
Correct Answer: D — Hormone secretion
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Q. Which of the following is NOT a function of the stem in flowering plants? (2019)
A.
Support
B.
Transport of nutrients
C.
Photosynthesis
D.
Water absorption
Show solution
Solution
The stem does not absorb water; this function is primarily performed by the roots.
Correct Answer: D — Water absorption
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Q. Which of the following is NOT a function of the stem? (2019)
A.
Support
B.
Transport of nutrients
C.
Photosynthesis
D.
Water absorption
Show solution
Solution
The stem does not absorb water; this function is primarily performed by the roots.
Correct Answer: D — Water absorption
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Q. Which of the following is NOT a lipid? (2023)
A.
Triglycerides
B.
Phospholipids
C.
Cholesterol
D.
Glucose
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Solution
Glucose is a carbohydrate, not a lipid.
Correct Answer: D — Glucose
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Q. Which of the following is not a living organism? (2022)
A.
Bacteria
B.
Virus
C.
Fungi
D.
Algae
Show solution
Solution
Viruses are not considered living organisms as they cannot carry out metabolic processes on their own.
Correct Answer: B — Virus
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