Chloroplast is the organelle that performs photosynthesis
The heart begins its work approximately 21 days after conception. As a single cell pump, it will soon develop into four distinct chambers. It becomes the muscle; all other muscles depend to do their work. Beating on an average day 115,000 times, about 200 gallons of blood is pumped into arteries and veins traveling an unprecedented 12,000 miles a day while overcoming gravity to provide nutrients to every organ, muscle, nerve, and tissue.
It is the force of the hearts contraction that maintains our blood pressure; allowing us to breathe and exchange gases at all levels of respiration, ensuring oxygen is provided to all cells of the body, and waste products are eliminated.
Their source of carbon. Autotrophs obtain their carbon from inorganic sources such as from atmospheric carbon dioxide. Examples of autotrophs include plants, and euglena ( a protist).
Heterotrophs on the other hand, obtain their carbon from organic sources such as other organisms. Examples of heterotrophs include all secondary consumers, and decomposers.
All planets have these same layers (From deepest to shallowest, inner core then the outer core, then the mantle, and lastly the crust. A good example is the Earth) that is shown in the diagram, even the sun has all the layers I just listed.
But, some planets I can think of are Mars, Venus, Moon, and the Earth of course.
Layer C. sounds like it could also represent Layer D, since they are so close.
P. S. I did my best to try to answer this.
