Electrical energy is able to move through materials that are conductors, but insulators do not conduct electricity well. Which of the following materials are good conductors?
I. rubber
II. plastic
III. metal
IV. wood
A.
III and IV only
B.
I and II only
C.
III only
D.
I, II, and IV only

Which element provides strength to the exoskeleton of clams and oysters

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.