If substance has a pH of 2, it is considered to be a A) strong acid
B) weak acid
C) strong base
D) weak base
E) neutral

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Select the correct answer. what does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms