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Pretest: Energy Use and Organisms
12
Select the correct answer.
What's the role of oxygen in cellular respiration?
ОА
ОВ.
It accepts electrons and keeps the electron transport chain running.
It breaks down carbon-based sugar molecules to release energy and forms carbon dioxide.
It combines with hydrogen ions in sugar molecules to release energy and form water.
It supplies electrons to the electron transport chain to keep it running.
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Common commercial benefits of microorganisms include synthesis ofa. insulin. b. antibiotics. c. aspirin. d. antibiotics and aspirin. e. antibiotics and insulin.

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.

In the water cycle , when does water undergo a chemical change