There are two main sources of ocean sediment:
<span>1.External (terrigenous) formed from the deposit of insoluble materials, like <span>rock and soil particles. It is transported from land areas to the </span>ocean by wind, ice, and rivers. It also includes products of submarine volcanism.</span>
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2. Internal (biogenic and authigenic) formed from the remains of marine organisms or their shells and from chemical precipitates from the seawater.</span>
In evolution, the study of vertebrate forelimbs is related to anatomical evidence.
B. the outer most layer of the sun's atmosphere
Lung evolved long before hair
Lungs evolved along fish which preceded land mammalian animals that have hair in their body. According to the theory of evolution, Vertabraes evolved from fish,several million years ago. Fish have lungs but do not ahve hair, but all mammals have hair and lungs.
Because they need to sta warm while they are awake at night
