Electrons become excited in the during the first stage of photosynthesis.
a. grana b. stroma c. chlorophyll d. mitochondria

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community

Which of the following explains why a tree is often used as a model to represent the principle of common descent

Compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.