Explain in terms of evolutionary theory the benefits of the following nutritional adaptations: a) different lengths of beaks in males and females of some

Explain in terms of evolutionary theory the benefits of the following nutritional adaptations:
a) different lengths of beaks in males and females of some insectivorous birds of the same species;
b) a different lifestyle in the larva and imago of the May beetle;
c) development with metamorphosis in amphibians.
How do these adaptations affect the struggle for existence?

1) Birds with different beaks can feed on different insects in different tiers.
2) The larva of the May beetle feeds on the roots of plants, and the adult beetle feeds on their leaves.
3) Larvae are herbivores. They live and eat in water. Adults – predators, live in water and on land.
4) Differences in developmental cycles or in the structure of the same organ can reduce intraspecific competition between individuals of the same species, living in different environmental conditions and eating different foods

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