Which of the following is a true statement? a. the closer a comet gets to the sun, the more visible it becomes. b. the largest part of a comet is the nucleus. c. a comet travels at a higher rate of speed as it moves further away from the sun. d. comets travel in straight lines and do not rotate around the sun.

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.