Answer:
They typically have a tough, spiny surface, which inspired their name (in Greek, echinos means “spiny” and derma means “skin”). They also have the unusual ability to regrow lost body parts, and sea stars and brittle stars can regrow arms if broken off or eaten
Explanation:
18mg for a 19-50 year old adult female.
Answer:Plz mark Brainliest
Explanation:
The correct answer is the first one.
Answer:
Action potential.
Explanation:
Action potential may be defined as the change of the membrane potential of the cell with response to the stimulus. The different ions enter and exit the cells.
Action potential generates in the cell when the threshold voltage - gated channel reaches and opens the voltage gate channel. The opening of voltage gated channel changes the membrane potential of the cell.
Thus, the correct answer is option (4).
Answer:
The forces acting on the box became unbalanced when the third student started pushing.
Explanation:
The horizontal forces, friction and applied, were balanced until more force was applied than friction. Mass can't increase or decrease.
