Giving a definition deals with properly explaining the term(s) concerned to avoid further confusion and to make sure your audience ain't lost. It is not merely to copy what was printed in other dictionaries that gives a definition. Choose terms that your understanding or that personal observations has affected. By defining its roles, structure or existence, you can define a phrase.
Asexual reproduction (requiring one parent) forms exact copies of the parent cell. The type of cell division that produces exact copies is mitosis. Therefore the answer is D.
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose.