The enamel. For example lemon juice can destroy your enamel it’s like another way that protects the teeth but you should also protect the enamel.
Answer:
It is the process where by plants manufacture their own food by using raw material such as carbon (iv) oxide, water and sunlight.
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Capillaries: <span>any of the fine branching blood vessels that form a network between the arterioles and venules.</span>
Answer:
The correct option is <u><em>A. they evolved from land mammals.</em></u>
Explanation:
The process of evolution explains how closely one organism is to another based on their common ancestors. Scientists believe that those organisms which show many similarities in their structures or functions might have evolved from a common ancestor in the past.
As in the above-mentioned question, scientists have observed that cetaceans lack gills and breath air, this is a property of land mammals. The cetaceans have fin bones which are similar to the limb bones. As limb bones are present in land mammals, hence they cetaceans and land mammals might have common ancestors in the past.
