Which device directly converts chemical energy into electrical energy? a. solar-powered calculator b. battery-powered flashlight c. wood-burning stove d. wind- powered sailboat

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

What is the most abundant vertebrate on earth?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes