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Internal/external fertilization

Internal- the sperm meets the egg within the female. One advantage for internal is the embryo will be safe. A disadvantage is it limits the amount of offspring.
External the sperm meets the egg outside in the open. It occurs mainly in wet environments. An advantage is it will produce a large number of offspring. A disadvantage is the environment isn't protective and attracts predators.

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Map review thingy

By JWH_Nova