If you see a diseased plant, it is most likely in the stage of its life cycle.
adult
death
growth
beginning

What was the land like over 500 million years ago? what was under the sea?

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.

The term facultative anaerobe refers to an organism that