Which describes a way that the plum pudding model was shown to be incorrect? select one: a. neutrons were shown to be located in the nucleus. b. electrons were shown to be located outside the nucleus. c. protons were shown to be positively charged. d. atoms were shown to contain mostly empty space.

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.

The pronunciation aid that determines the stress placed upon a syllable is the

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes