For an experiment to produce useful data, what must happen? A. It must be repeated several times.
B. It must be published in a famous journal.
C. It must prove a hypothesis correct.
D. It must be performed by a famous scientist.

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits

Which of the following is required of a new drug?me

Which example best describes a reflex action? a. eating food when hungry b. coughing when the throat is irritated c. bending down to lift a heavy object d. going for a walk outside