Can please anyone help ples please pleasee

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

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.

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?