Which of these molecules is not formed by the activity of the electron transport system. a.) nah+ b.) oxygen c.) fad d.) water

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.

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi