Mitochondria are
a. found in the plasma membrane.
b. "batteries" that provide energy for cells.
c. cells with flagella.
d. organelles that contain the genetic material for the cell.

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

Are the layers of rock above and below the coal older or younger?

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.