This 9th Grade Biology Quiz covered key topics like cells, body systems, photosynthesis, enzymes, and ecosystems. Keep reviewing these concepts to build a strong foundation for advanced biology topics.
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1 What is the basic unit of life?
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Tissue
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Organ
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Cell
Correct!Wrong!Explanation:
All living organisms are made of cells, which are the smallest units that can carry out life functions.
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2 Which part of the cell controls all cell activities?
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Cell membrane
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Nucleus
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Cytoplasm
Correct!Wrong!Explanation:
The nucleus contains DNA and acts as the control center of the cell.
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3 What is the function of mitochondria?
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Make proteins
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Store water
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Produce energy
Correct!Wrong!Explanation:
Mitochondria are known as the “powerhouse of the cell” because they release energy through respiration.
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4 Which process do plants use to make their own food?
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Respiration
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Digestion
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Photosynthesis
Correct!Wrong!Explanation:
Plants use sunlight, carbon dioxide, and water to make glucose during photosynthesis.
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5 Which gas is released during photosynthesis?
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Carbon dioxide
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Oxygen
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Nitrogen
Correct!Wrong!Explanation:
Oxygen is released as a by-product when plants make food. -
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6 Which system is responsible for transporting blood in the human body?
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Circulatory system
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Digestive system
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Nervous system
Correct!Wrong!Explanation:
The circulatory system moves blood, oxygen, and nutrients throughout the body.
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7 What do enzymes do in the digestive system?
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Kill bacteria
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Absorb nutrients
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Speed up chemical reactions
Correct!Wrong!Explanation:
Enzymes help break down food into smaller molecules quickly.
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8 Which level of organization comes after tissues?
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Cells
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Organs
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Systems
Correct!Wrong!Explanation:
Cells form tissues, tissues form organs, and organs form systems.
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9 Which organism is a producer in a food chain?
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Grass
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Lion
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Snake
Correct!Wrong!Explanation:
Producers make their own food using sunlight and form the base of the food chain.
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10 What is DNA responsible for?
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Making energy
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Digesting food
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Carrying genetic information
Correct!Wrong!Explanation:
DNA contains instructions that determine traits and how organisms grow and function.
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