What do you think?
oil exploration in anwr could
have a negative impact on the
animals and people living in
and around the refuge, but oil
in the refuge may the u. s.
meet its future energy needs.
without knowing what the
consequences or benefits will
be, do you think that the u. s.
should permanently protect the
anwr or open it for oil explo-
ration? explain.

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

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.