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3. what makes each specialized cell like a muscle cell or neuron
different are the __each cell produces allowing for its
identity.(answer in lowercase; no spaces) *

"do a testcross with a homozygous recessive plant."

reflection is the bouncing back of a propagating wave when it encounters a barrier; usually shows an image of the source of light wave

1) bounces back from an opaque material

2) bounces back from the boundary

3) seen in mirrors

refraction is the bending of a propagating wave having a shift of direction as it passes through different media; usually seen in lenses to magnify or lessen

1) passes through a prism

2) moves from one medium to another

3) seen in lenses

genetic variations are caused by mutations which are random in the population