Answer:
During inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. This creates a lower pressure within the lung than that of the atmosphere, causing air to be drawn into the lungs.
Explanation:
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Answer:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.
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Answer:
heavy skin pigmentation despite the far northern latitude at which they live.
Explanation:
The correct answer is B. Delta, Deltas can only be formed when sediments are being carried by the waterway (stream,river). As the water flows and meets another body of water, sediments land and piles up making beds. As the water flows through shallow areas, it forms triangular shaped areas of water where the stream meets a larger area of water.