Compare and contrast the role of nature d the natural world in two poems from this unit: walt whitman’s “come up from the fields father” and sara teasdale’s “there will come soft rains.” be sure to use specific examples from both poems to support your response.

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.

Ascientific idea becomes valid when it is what?

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.