The scientific method _
was developed during the 20th century
begins with the design of an experiment
can answer all scientific questions
provides an organized way to answer scientific questionstha

In a cladogram' when does a group of organisms branch off

Why are common names a problem for scientist?

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.