Which two processes provide the glucose and nitrogen used to form amino acids in plants? A. cellular respiration and the citric acid cycle.

B. photosynthesis and nitrate absorption.

C. photosynthesis and dehydration synthesis.

D. glycolysis and nitrate absorption.

What are some things that limit population growth?

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.

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because