Which term describes the difference in the concentrations of a substance across a cell's membrane?

a. Diffusion membrane

b. Concentration membrane

c. Concentration gradient

d. molcular concentration

Know the difference between lipid soluble and water soluble hormones and how they elicit their effects on target cells.

Which two digestive system organs are important sources of hormone associated with digestion?

Which emits visible light A. Moon B. Planet C. Satellite D. Star

True or False: Organisms grouped into the same kingdom have more similarities with one another than with organisms in other kingdoms

Cancers detach ribosomes

R = red flowers r = white flowers According to Mendel's law of dominance, which statement best describes the result of a cross between parents with genotypes Rr and Rr? A) Only RR offspring will have red flowers.

What does the onset of menopause indicate about the number of immature eggs remaining in the ovaries?

What is on potential scientific benefit of the human genome project

What makes finches in the Galápagos Islands a good example of speciation?

Two genes, A and B, are found on the same chromosome. One homologous chromosome carries alleles A and B, whereas the other homologous chromosome carries alleles a and b.