Look at the information below. Sugar is added to the test tube to provide for the yeast. What one word completes the sentence.

Why has two different alleles for the same trait?

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.

Describe the impact of deforestation of both abiotic and biotic factors within the tropical rainforest.