Answer:
That layer is called the a horizon, so the answer is A.
Explanation:
Answer:
The invention of the electron microscope allowed them to see organelles and other structures smaller than cells. There is variation in cells, but all cells have a plasma membrane, cytoplasm, ribosomes, and DNA. These similarities show that all life on Earth has a common ancestor in the distant past
Answer:
All of the above
Explanation:
I hoped I helped sorry if this isn't correct
Answer:
Spirometry is a type of pulmonary function test (PFT), a noninvasive procedure that provides important information about how well the lungs are working. More specifically, it reveals how much air is moving through the lungs and how quickly as you breathe through a tube.
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