Problem: OPTIONS:
- vascular tissue
- passive transport
- photosynthesis
- gas exchange
Q: Q: What is needed to provide cells with the oxygen they need for cellular respiration?   A:
Answer: gas exchange
Problem:OPTIONS:
- bones
- corals
- fuels
- fossils

Q: Tree sap enclosing an organism in amber or an organism preserved in tar or ice are actually examples of what?   A:
****
A: fossils
Q: What is the rotational equivalent of a force?   A:
OPTIONS:
- momentum
- power
- centripetal force
- torque
torque
Q: What does the megaspore mother cell produce after meiosis division?   A:
OPTIONS:
- four diploid megaspores
- two diploid megapores
- two haploid megaspores
- four haploid megaspores

Answer: four haploid megaspores
Question: Q: What celestial events are the source of elements heavier than iron?   A:
OPTIONS:
- neutrons
- galaxies
- Space
- supernovas
Answer: supernovas
input: OPTIONS:
- some matter
- Objects
- Solids
- all matter Now, answer this question: Q: Elements are pure substances that make up what?   A:
A:
output:
all matter