Type of speciation where a geographical barrier physically separates populations.
Type of speciation where organisms are in the same area but are isolated reproductively.
The key to speciation is the _________________ isolation of populations.
The development of a new species.
Birds not singing the right song causes non mating and this type of isolation.
When fertilization occurs but the offspring does not develop, this is due to a ______________ incompatibility.
Zebras and Donkeys are different species because the hybrid Zonkey is unable to ____________.
Down
With this kind of barrier, fertilization occurs but the offspring is not viable or fertile.
Natural selection acts separately on the advantageous ________ in populations.
With this kind of barrier, fertilization does not occur and organisms do not interact.
Group of populations that can interbreed and produce fertile offspring.
Type of isolation caused by differences in where the species live.
Frogs that breed at different times and do not mate are an example of this type of isolation.
Isolation separates the ______ pool of species.
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It prints on two pages.
Big puzzles won’t always print on one page — the clues and grid are the smallest we could make them while keeping them readable for everyone.
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