Afarmer has a herd of cattle with an average weight of 1,000 pounds. he breeds a group of his heaviest cattle, which have an average weight of 1,800 pounds. the weight of each offspring is listed below. offspring 1: 1,648 pounds offspring 2: 1,640 pounds offspring 3: 1,718 pounds offspring 4: 1,794 pounds what’s the average weight of the offspring? the average weight of the offspring is pounds.

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Eutrophication caused by human nutrient pollution.

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.