A. How would our oil refineries interact with other spheres and factors (biotic and abiotic) if humans suddenly disappeared?
b. What sphere is an oil refinery part of?
c. Is the oil refinery a biotic or abiotic factor in our planet?

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

Which of the following is not a potential result of deforestation?

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.