If animal species are determined by animals not being able to have viable offspring, how are plant species determined?

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Such as (made up example, idk if it’s real) you may be able to cross bread oranges and lemons, and get something you can plant and grow.

In: Biology

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Anonymous 0 Comments

Exactly the same way – natural evolution. Where things get complicated is humans … *encouraging* evolution by selecting specific plants and selectively breeding them. Google for ‘Hybrid Citrus’, you`ll be surprised at what fruits humans have created.

Cross-breeding or selective breeding in this way only needs the species to be genetically close enough. You can`t cross an apple and a tomato, but a great example of where you can are dogs – they can all interbreed so it is possible to cross a bulldog with a shi-tzu and end up with a bullshit. Actually true, though they’re really called bull-tzu, which is far less fun.

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