Input: Answer this question:
Which two body systems work together to transport oxygen to the cells?
Answer: respiratory and circulatory
Input: Answer this question:
The fossils that are found in the oldest layers of sedimentary rock were formed which types of organisms?
Answer: only organisms that lived in the sea
Input: Answer this question:
In any physical or chemical process, what two quantities are always conserved?
Answer: matter and total energy
Input: Answer this question:
Which of the following occurs during photosynthesis?
Answer:
CO2 and H2O are converted to carbohydrates.