Four substances (A, B, C, and D) are mixed in a test tube during a chemical reaction. The concentrations of the four substances are measured at 0s and at 100s. Time (s) [A] (mM) [B] (mM) [C] (mM) [D] (mM)

0 1 5 3 5

100 2 5 1 2

Based on the data, which substance was a product of the chemical reaction?

A.

Substance A

B.

Substance B

C.

Substance C

D.

Substance D

What type of lipids are found in all biological membranes?

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls