Question: What is the effect of day length on plant growth? Hypothesis: Plants will grow more when the day is longer. What variables would you likely need to control? Check all that apply. soil water humidity nutrients plant growth temperature day length

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.