Help with this pls about chromosomes

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.

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination