ASVAB Study GuideGeneral Science Practice Test 11
Tap an answer to check it instantly and read the explanation. 10 questions: 3 easy, 4 medium and 3 hard.
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Question 1 easy
Which organ system is primarily responsible for transporting oxygen, nutrients, and waste products throughout the human body?
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Correct answer: B — Circulatory system
The circulatory system (heart, blood, and blood vessels) pumps blood to transport oxygen, nutrients, and metabolic wastes throughout the body.
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Question 2 easy
What primary gas do plants absorb from the atmosphere to carry out photosynthesis?
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Correct answer: C — Carbon dioxide
Plants absorb carbon dioxide from the air and water from the soil, using sunlight energy captured by chlorophyll to produce glucose and oxygen.
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Question 3 easy
Which human body system includes organs such as the thyroid, adrenal glands, and pancreas?
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Correct answer: A — Endocrine system
The endocrine system consists of glands (like the thyroid, adrenal glands, and pancreas) that secrete hormones directly into the bloodstream to regulate bodily functions.
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Question 4 medium
Which organelle is known as the powerhouse of the cell because it generates most of the cell's ATP energy?
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Correct answer: C — Mitochondrion
Mitochondria convert nutrients and oxygen into ATP (adenosine triphosphate) through cellular respiration, earning them the nickname 'powerhouse of the cell'.
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Question 5 medium
The process by which organisms convert glucose into usable energy (ATP) in the presence of oxygen is called:
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Correct answer: B — Cellular respiration
Aerobic cellular respiration is the chemical process in which cells break down glucose using oxygen to yield water, carbon dioxide, and energy stored as ATP.
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Question 6 medium
Which type of muscle tissue is involuntary, non-striated, and found in the walls of internal organs such as the stomach and blood vessels?
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Correct answer: C — Smooth muscle
Smooth muscle tissue is non-striated and functions involuntarily to move substances through internal organs like the digestive tract and blood vessels.
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Question 7 medium
Which organ in the human body is primarily responsible for filtering blood to produce urine and regulating fluid balance?
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Correct answer: D — Kidney
The kidneys filter blood to remove nitrogenous metabolic waste, regulate fluid and electrolyte balances, and produce urine.
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Question 8 hard
Which fibrous carbohydrate is the principal structural component found in the exoskeletons of arthropods and cell walls of fungi?
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Correct answer: B — Chitin
Chitin is a tough, nitrogen-containing polysaccharide that serves as the main structural material in fungal cell walls and insect/crustacean exoskeletons.
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Question 9 hard
Which type of blood vessel contains microscopic, thin walls that allow the exchange of gas, nutrients, and waste between blood and tissue cells?
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Correct answer: C — Capillary
Capillaries are the smallest blood vessels with single-cell thick walls, serving as the sites for exchange of nutrients, oxygen, and metabolic wastes with surrounding tissues.
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Question 10 hard
What ecological term describes a close, long-term biological interaction between two different biological organisms of different species?
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Correct answer: B — Symbiosis
Symbiosis refers to close and prolonged relationships between different species, which can be mutualistic, commensalistic, or parasitic.