Which of the following describes a frameshift mutation? * A) Substitution of one nucleotide for another.
B) Insertion or deletion of a group of nucleotides that is a multiple of three.
C) Insertion or deletion of a group of nucleotides that is not a multiple of three
D) insertion or deletion of nuleotides that results in a premature stop codon

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.

How does natural selection change thephenotypes within a population over time?

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?