cho cơ thể có kiểu gen AB/ab, khi giảm phân tạo giao tử bình thưởng có hiện tượng tiếp hợp và trao đổi chéo với tần số hoán vị gen là 25%. tỉ lệ mỗi loại giao tử

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

In which part of the body is a ball-and-socket joint found?

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.