The lock-and-key mechanism refers too the complementary shapes of an enzyme and a substratethe attractive forces between an enzyme and a substrate. o the ability of an enzyme to lower the activation energy of a reactiono the ability of an enzyme to "unlock" the products of a reaction

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

Using meiosis, the sporophyte produces spores that are .