70. based on the simple food chain for cod shown here, and what you know about the biology of cod, propose one action that people could take to the cod population recover. (3 marks)

phytoplankton (producers) -> zooplankton -> small fish, shrimp, crabs -> cod

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.