What specific reproductive concept is discussed in relation to myths about an undeveloped embryo following joey loss?

Answer

Diapause, where a second, undeveloped embryo can be suspended in animation

When discussing the grim event of a mother ejecting her older joey during an escape scenario, certain biological concepts related to marsupial reproduction are sometimes brought up. One specific phenomenon mentioned is diapause, which refers to the ability of some marsupials to keep a second, less developed embryo in a state of suspended animation within the reproductive system. If the older joey is lost, this suspended embryo can theoretically resume development once the immediate crisis is over. However, the text notes that the immediate, desperate act of ejecting the older young one is the primary, chilling example of evolutionary trade-offs concerning immediate survival, rather than reliance on this secondary reproductive option.

What specific reproductive concept is discussed in relation to myths about an undeveloped embryo following joey loss?

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