Excuse my english please.
So I was wondering, why some animals are born in different ways, I would understand for example that some fishes are born through egg because of the water, it would be too hard to swim with a fetus, and then you have the whales. So in general, why are there so many ways of reproduction?
In: Biology
Different envioromental niches select for different traits, including reproductive traits. If you’re a simple fish, making lots of eggs but not caring for them much might be the best trait. If you’re a super smart mammal who needs years to educate your youlg, like an elephant, you can’t make as many.
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