Robert Hooke was a famous scientist who experimented with springs
(metal coils). He found that the farther you stretched the spring, the larger
the force with which the spring pulled back on you.
What was the independent variable in Hooke's experiment?
O A) the material the spring was made of
OB) the force of the spring pulling on you
OC) the distance the spring was stretched
OD) the number of coils of metal in the spring

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.

Atest cross can be used to -predict the phenotypes of a monohybrid cross -predict an unknown genotype of a purebred dominant plant -cross-breed dominant and recessive plants -give probabilities that a trait will appear

To test the responsiveness of the kidneys, scientists have designed an experiment tracking urine output of people during a normal day, while regulating the in-take of water by mouth. what would be an appropriate hypothesis for this experiment?