The pause of the development of an embryo has more benefits for preparing it to avoid the harsh times than for competing with its siblings.
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Prev: The bulk of the research shows that there may be a pause, or a shifting of gears in the 40s or 50s, but this shift "can be exciting, rather than terrifying".
Next: Once they start growing, such plants seem not to retain the ability to hit the pause button on metabolism in their stems or leaves.