If breathing is regulated to keep blood acidity balanced, then what does breathing help balance acidity levels? Answer choices: - blood - muscles - water - air - CO 2 - oxygen - Gases - protein
blood

If space explorers require preserved food for long flights, then space explorers require preserved foods for? Answer choices: - ground training - nutrients - Dehydration - survival - long flights - short flights - Special disposal - day trips
long flights

Q: If fossils are formed when remains of living things are covered over time, then fossils are formed when remains of living things are what? Answer choices: - buried in mud - break off - covered over time - Physical weathering - By coral exoskeletons - It remains dormant - saved in a box - kept in the dark
A: covered over time

Question: If plants exhibit phototropism, or growing toward the sun or artificial light, then what is called when plants grow toward the sun or an artificial light? Answer choices: - Exfoliation - Brownian motion - heat energy - phototropism - photovoltaic - autumn - peachleaf willow - mitosis
Answer: phototropism

*Question*
If vessels carry deoxygenated blood, then what carries deoxygenated blood? Answer choices: - cows - mammals - elephants - goats - vessels - crocodiles - ferns - chickens
**Answer**
vessels

(Question)
If mutations that lead to cancer usually occur in genes aiding in mitosis, then mutations that lead to cancer usually effect genes that aid in what? Answer choices: - illness - health - disease - blood transfer - chemotherapy - respiraration - mitosis - recovery
(Answer)
mitosis