I will give you 20 points who every answers this one!
Which of the following is true about mutation?
a. Mutation comes from artificial selection.
b. Mutation is always harmful to an organism’s survival.
c. Mutation is always helpful to an organism’s survival.
d. Mutation can come from environmental changes.

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.

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions