Aresearcher is setting up an experiment to compare the rates of movement of individuals from different light-sensitive single-celled organism species toward a light source. which is the constant in this experiment? a intensity of light source b organism species c rate of movement d direction of movement

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?

The activity of the modern sample is 1.10 bq . how long does that measurement take?