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Why was the evolution of jaws selected for? you can choose more than one there's more...

Why was the evolution of jaws selected for? you can choose more than one there's more than one correct answer.

it allowed for the evolution of teeth

it increased the efficiency of feeding

it increased respiratory efficiency

it increased the ability to grab food

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Answer #1

Option 1, 2 and 4 are relatable. The jaw evolution is primarily selected only for increasing the efficiency for feeding and ability to grab the food. Jaws evolved mainly to feed on a variety of food resources and help organism to perform various food habits. Apart from that predation and defence were the key role of jaws. They help to grab food and perform defence against pedators. The jaw shape also helps to decided the mode of nutrition for a individual, thus indirectly it also helped to evolve teeth for specific mode of nutrition also. Teeths started to evolve after jaws evolution. Though jaws do not have much significance in respiratory system.

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