Answer:
A
Explanation:
The other answer choices are false and the three parts of the cell theory is
All cells come from other cells, all living things are made of one or more cells, and the cell is the fundamental structure of life.
A sudden change in a character/ gene / chromosomes of an organism is mutation.
Answer:
notochord, a dorsal hollow nerve cord and pharyngeal slits.
Answer: 1
Explanation: Oxygen moves in and carbon dioxide moves out of body.
