Answer: salt
Freshwater is defined as having a low salt concentration, usually less than 1%.
Explanation:
Freshwater refers to the bodies of water that contain very low levels of dissolved salts. So, freshwater are unique for their low salt content (about 0.5% of salt) compared to the sea water with high salt content.
Examples of freshwater include rivers and spring
Answer:
Cells are the basic units of structure and make up tissues.
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Answer:
from precipitation, oceans lakes streams and soil
Parasympathetic nerves govern involuntary actions such as pupil dilation, peristalsis, gland secretions, etc.