Complete the following sentence. To reduce the chances of resistant insects evolving from overexposure to BT-modified crops, farmers producing these crops are required to also plant varieties of the same crops.

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

About __ of the mass of the cell is water

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.