Answer:
When you eat, food passes from the throat to the stomach through the esophagus. A ring of muscle fibers in the lower esophagus prevents swallowed food from moving back up. These muscle fibers are called the lower esophageal sphincter
Explanation:
Answer;
10 bacteria cells can fit into an animal cell.
Explanations;
Cells can vary greatly in terms of size and shape.Bacterial cells are very small, they are about 10 times smaller than most plant and animals cells. most bacterial cells range in size from 1 to 10 micrometers (in length). The size of an animal cell on the on the other hand ranges from 10 to 100 micrometers.
Answer:
Charles Darwin's theory of evolution states that evolution happens by natural selection. Individuals in a species show variation in physical characteristics. As a consequence those individuals most suited to their environment survive and, given enough time, the species will gradually evolve
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Explanation:
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