Which of the following was Theodor Schwann's contribution to our understanding of cells A. Cells are the basic units of life.

B. All plants are made of cells.

C. All animals are made of cells.

D. All cells are produced from existing cells.

Which of the following best describes the purpose of technology?

2. what process do mrna and trna work together to complete? (3 points)

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.