Parent rocks.
( I got it wrong when I put Inorganic materials)
The kidneys.
The kidneys keep blood isotonic by removing excess salt and water through urine.
True is the correct answer.
Answer:
English physicist Robert Hooke is known for his discovery of the law of elasticity (Hooke's law), for his first use of the word cell in the sense of a basic unit of organisms
some of his other inventions were universal joint, balance wheel, and the diaphragm
Explanation: