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10 cards from this deck
When gametes join to create a zygote
Male and female reproductive cells
Outside female's body in aquatic environment
Water as medium for sperm to swim
Fish and amphibians
Inside the female's body
Reptiles, birds, and mammals
External: massive quantities; Internal: fewer needed
Young born well-developed, need minimal parental care
Young born underdeveloped, need extensive parental care
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