QUICKLY PLEASE A scientist wants to get the most accurate results for his experiment, so he does multiple trials and averages the result. This is an example of A. replacement. B. repetition. C. redundancy. D. replication.

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.

As scientist had investigated evolution from a variety fields they have found