In a dna molecule the ratio of adenine (a) molecule to thymine (t) is 1: 1. if in a strand of dna there are 1 million a molecules, how many t molecules are expected in the same strand? a)1 millionb)2 millionc)3 milliond)4 million

Competition occurs between species when

Which is a function performed by stem cells in the skin a. replacing lost skin cells b. making cells for the intestines c. growing new organs d. differentiating into brain cells plz apex

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.