L-serine is an amino acid that often is provided when intravenous feeding solutions are used to maintain the health of a patient. it has a molecular weight of 105, is produced by fermentation and recovered and purified by crystallization at 10 deg
c. yield is enhanced by adding methanol to the system, thereby reducing serine solubility in aqueous solutions.

Many people try to eliminate fat from their diets. which is one reason it is necessary for humans to eat fat? a. eating fat is the fastest way to get energy. b. fat eliminates triglycerides from the body. c. saturated fats clear out the blood vessels. d. fat nerves transmit signals. , this is for apex in summer school.

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas