Results in science are not generally accepted as being accurate until they can be verified. Which of the following is an example of repetition in science? A. A student designs an experiment on plant growth that includes multiple trials. B. One scientist carries out the same experiment performed by another scientist to validate the results. C. A scientist poses a new question for investigation after reading the results of another scientist’s work. D. A scientist analyzes the data included in the published work of another scientist and agrees with the conclusions

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.

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.

Which type of neuron stimulates muscles to contract?