Mechanical digestion is the breaking down of food into smaller pieces physically. Mechanical digestion begins in the mouth as the food is chewed.
but in the case of chemical digestion, it breaks the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva.
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Answer:
a. Tetrapods were no longer tied to the water for reproduction
Explanation:
The amniotic egg is hard-shelled and is called an amniotic egg because the embro develops within a sac called amnion.
Amphibians were first tetrapods to invade the land. The need to return to water for reproduction limited their distribution. Amniotes evolved an egg that broke the tie to freshwater.
Amniotic egg contains a series of extraembryonic membranes (Amnion, allantois, chorion, yolk sac) that, among their features , takes the aquatic environment with the egg.
Hence a. Tetrapods were no longer tied to the water for reproductionis believed to be the most significant result of the evolution of the amniotic egg.
Answer : Determine the skater's average velocity from t=0s to t= 12s. Velocity = displacement Xp-X, 1 time met 0-0 12 secs
Low cancer rates correlate with high vegetable intakes and high grain intakes.
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Their was a matching error between the base pairs AA because A should go with C not another A