Breaking down of glucose is it photosynthesis or cellular respiration

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

Which type of transport is responsible for oxygen entering into blood cells? a. vesicle b. passive c. facilitated d. active b. passive