Explain how a stem cell knows what to become. Use the following terms in your response: gene expression, DNA, transcription factor, mRNA and differentiate.

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x albino a) all chinchilla b) 1/2 chinchilla, 1/2 albino c) 3/4 chinchilla, 1/4 albino

Moving down the ramp from 6 meters to

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient