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ziro4ka [17]
3 years ago
7

Pleas help me with this

Biology
1 answer:
Veronika [31]3 years ago
7 0
The ones about enzymes are chemical digestion and the ones about chewing are mechanical digestion.
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Vibrissae, more commonly known as whiskers, are sensory hair that generally have a tactile sense, which is equivalent to skin. They grow on most mammals except monotremes (duck-billed platypus and echidnas) and humans, though humans still have remnants of the muscles once associated with vibrissae in their upper lips. Vibrissae serve a number of purposes: such as sense of touch; detection of danger, air and water currents, and movements of other animals; and the locating of food.

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four billion years ago the earth had a layer of ozone gas

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