Uh what’s the second layer of the Grand Canyon made of
Please.

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 organelle other than the nucleus houses dna in a eukaryotic cell?

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms