None of the answer make logical sense except overfishing.
Living systems follow the laws of conservation of mass and energy by <span>stating that </span>matter<span> is not created nor destroyed as a result of chemical reaction.
I REALLY hope this has helped you!!! :)
(If you can, please rate as Brainliest answer! If you could, that would make my day!!!!)</span>
FALSE
All organisms use this "mechanism" to defend their food and shelter. Birds protect their nest just like all other animals and they fight for food.
I hope this answers your question.
Please remember to rate my answer and comment if you have any questions.
Answer:
Answer is Sinoatrial node, SA.
Explanation:
The sinoatrial node, SA, is known to be a group of cells which are found at the top of the heart.
The electrical signal that is initiated by the sinoatrial node bring about or stimulates the atria and then the ventricle of the heart.
It should be noted that, the sinoatrial node are regarded as the pacemaker cells.
Phase change is the change in state. i.e. water to steam or ice to water
