oxygen is necessary for good water quality. As dissolved oxygen levels in water drop below 5.0 mg/l, aquatic life is put under stress. The lower the concentration, the greater the stress
Answer:
peristalsis.
Explanation:
Food moves through your GI tract by a process called peristalsis.
Answer:
When a muscle contracts, the actin is pulled along myosin toward the center of the sarcomere until the actin and myosin filaments are completely overlapped.
Explanation:
Is this the answer you're looking for?
Answer:
reproduction
We don't HAVE to reproduce to live, but it needed for us to be brought in to this world.
Explanation:
Opposite of photosynthesis your welcome
