CLEP Introduction to Natural Science 2 — Questions and Answers
Question 1: Which organelle is responsible for producing most of a eukaryotic cell's ATP?
- Ribosome
- Mitochondrion (Correct answer)
- Golgi apparatus
- Lysosome
Correct answer: Mitochondrion
Mitochondria generate ATP through aerobic cellular respiration.
Question 2: What is the primary gas absorbed by plants during photosynthesis?
- Oxygen
- Nitrogen
- Carbon dioxide (Correct answer)
- Hydrogen
Correct answer: Carbon dioxide
Plants take in carbon dioxide and release oxygen during photosynthesis.
Question 3: Which type of rock forms from the cooling and solidification of magma or lava?
- Sedimentary
- Metamorphic
- Igneous (Correct answer)
- Fossil
Correct answer: Igneous
Igneous rock forms when molten rock cools and crystallizes.
Question 4: What force keeps the planets in orbit around the Sun?
- Magnetism
- Gravity (Correct answer)
- Friction
- Electromagnetism
Correct answer: Gravity
Gravitational attraction between the Sun and planets maintains their orbits.
Question 5: Which subatomic particle carries a negative electric charge?
- Proton
- Neutron
- Electron (Correct answer)
- Positron
Correct answer: Electron
Electrons orbit the nucleus and carry a negative charge.
Question 6: What is the process by which liquid water changes into water vapor?
- Condensation
- Evaporation (Correct answer)
- Precipitation
- Sublimation
Correct answer: Evaporation
Evaporation converts liquid water to gas as it gains energy.
Question 7: Which scientist is credited with formulating the theory of evolution by natural selection?
- Gregor Mendel
- Charles Darwin (Correct answer)
- Louis Pasteur
- Isaac Newton
Correct answer: Charles Darwin
Charles Darwin proposed natural selection in 'On the Origin of Species.'
CLEP Introduction to Natural Science 2
Which organelle is responsible for producing most of a eukaryotic cell's ATP?