INITIAL PHENOMENA QUESTION: HOW IS IT THAT EVERY LIVING ORGANISM HAS SPECIALIZED CELLS THAT CONTAIN GENETIC MATERIAL-MADE UP OF ONLY 4 DIFFERENT BASES–YET EVERY
ORGANISM IS VERY DIFFERENT?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

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.