B, because the mitochondria is the power house of the cell meaning it’s where the energy is made in a cell.
Three weeks is how long a human can live without food
Scientist, a fact is something that can be tested by anyone with the proper skill and equipment, and that repeatedly and reliably gives the same result every time. A scientific theory is a body of knowledge based on facts that describes their interaction in the simplest possible way
One group of reptiles, characterized by the fossil Archaeopteryx, led to the evolution of birds. The correct answer is birds
Hémoglobin =other name for blood