Answer: B. S cycle
Explanation: The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA.
The answer to this is the Troposphere.
D A cactus stores water during wet periods, allowing it to live during the dry periods Description
Answer:
The aim of the muscles in the heart is to transport blood,which is the fluid. As for protection the pericardium fluid is responsible
Acids: hydrogen ions; bases: hydroxide ions
