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Organisms may appear to
be alike and be different
species. Organisms may look different
and yet be the same species.
Change in chromosome number
Polyploid species result from nondisjunction
(chromosomes fail to separate properly) during
meiosis or mitosis.
the idea that species
evolve at a slow, steady rate, with
small, adaptive changes gradually
accumulating over time.
- argues that
speciation occurs quickly, in rapid
bursts, with long periods of genetic
equilibrium in between.
When one species
evolves into an array
of different species to
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