What is a volatile liquid? A. liquids where the relationship between their mass and volume is a constant
B. liquids that evaporate and form gases easily
C. liquids with the ability to burn in the presence of oxygen gas (O2)
D. liquids with the ability to react or change into another substance

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.

Which is an example of a decomposer? a. bear b. algae c. grass d. bacteria d bacteria

Suppose you are provided with an actively dividing culture of e. coli bacteria to which radioactive thymine has been added. what would happen if a cell replicates once in the presence of this radioactive base?