The contractile vacuole expels water out of the cell by contrasting.
The brain it sends messages to the spinal cord which aids for the movement of the body
spinal cord aids for movement
Answer:
homo habilis
Explanation: first human to walk earth.
Answer:
• ecosystem. A community interacting with its physical environment through the transfer of energy and materials
Explanation:
brainliest pls
4 amino acids. 3 nucleic acids equals one codon which codes for an amino acid
