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The law of decreasing returns applies to
Grasses
A large and diverse family of plants, known scientifically as Poaceae, which includes wheat, corn, and rice, and is characterized by narrow leaves growing from the base.
Synapsids
A group of animals that includes mammals and their extinct relatives, characterized by a single temporal fenestra (an opening in the skull behind each eye).
Reptiles
Cold-blooded vertebrates characterized by scales or hard plates, such as snakes, turtles, and lizards, that reproduce mostly through eggs.
Modern-Day Mammals
Contemporary species of the mammalian class, characterized by features such as hair, three middle ear bones, and mammary glands for feeding young.
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