1. What are phytoplankton? They are any plants that drift with the currents of the ocean.
They are small plants and animals that exist both on land and in the ocean. n.
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They are microscopic animals that drift with the currents of the wind.
They are only microscopic plants that only exist on the land.

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.