The structure of a water molecule is two oxygen atoms bonded
to the hydrogen atom.
true
false

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.

Located at the epidermal-dermal junction of the skin. select all true statements about the transformation of melanocytes into abnormal cell

Which of the following is not one of the mechanisms of enzyme catalysis by which the substrate is converted to the product? a. changing substrate orientation b. changing substrate reactivity c. inducing strain in the substrate d. preventing an induced fit d. preventing an induced fit