People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

Find the mass of the cone using the triple beam balance. a. 543.0 g b. 542.0 g c. 504.28 g d. 502.8 g select the best answer from the choices provided a b c d

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems

which is an effect of short-term environmental changes? a) adaptation b) speciation c) extinction d) death (5 points)