1. rainbows are more beautiful after fall rainstorms than spring rainstorms.
this statement is a poor hypothesis because it is not?
a. a question
b. testable
c. observable
d. a comparison
2. when a biologist in a laboratory reports a new discovery based on experimental results, biologist in other laboratories should be able to
a. repeated the experiment with a different variable and obtain the same results
b. perform the same experiment and obtain different results
c. repeat the same experiment and obtain the same results
d. perform the same experiment under different experimental conditions and obtain the same results.

Aneuron is stimulated with an electric pulse. the action potential is detected at a point 3.70 cm down the axon 0.0052 s later. when the action potential is detected 7.20 cm from the point of stimulation, the time required is 0.0063 s. what is the speed of the electric pulse along the axon? (why are two measurements needed instead of only one? )

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Charles darwin published his theory of evolution in 1859. in what way foes modern evolutionary theory differ from the theory as proposed by darwin? a) darwin inferred that individuals can evolve, but modern generic science has shown that this is not true. b)darwin inferred that individuals do not evolve, but modern genetic science has shown that this is not true. c)modern science has disproved most of darwin's original theory of evolution, because darwin knew nothing about generations and their role in heredity. d)generic studies have shown that gene expression and other factors operate along with natural selection, but most of darwin's theory has been supported by modern science.