The feline sense of smell is enhanced by a structure in its mouth known as organ.
a. tinbergen's
b. jacobsen's
c. pavlov's
d. konrad's

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the dependent variable in galileo's experiment?

When is it most common for humans begin to develop a sense of self worth? a. adolescence b. early childhood c. infancy d. late childhood

Aspeed limit sign that says "night" indicates the legal speed between sunset and sunrise. a. minimum b. maximum c. only d. average