Iwill mark ! what elemental trend exists as we move down a column on the periodic table? chemical reactivity of metals increases chemical reactivity of nonmetals increases chemical reactivity of metals remains unchanged chemical reactivity of nonmetals remains unchanged

What is used to keep track of the gamates and possible offsprings combination

Which of these is not a nucleotide base found in dna?

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.