A. The onset of the menstrual flow
Answer:
sorry i don't know this answer of this question
Answer:
Chloroplasts
Explanation:
Chloroplasts are the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.
Answer:
the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
Hydrogen bonds connecting base pairs must be broken.
