A unit cell of NaCl contains a total of 4 atoms. This is because NaCl has a face-centered cubic crystal structure, with one Na+ ion at each of the eight corners of the cube and one Cl- ion at the center of each face of the cube. Therefore, each unit cell contains 1 Na+ ion and 1 Cl- ion, resulting in a total of 4 atoms. **

The cell is referred to as the smallest viable unit of plant or animal life because it is the basic structural and functional unit of all living organisms. Cells are capable of carrying out all the processes necessary for life, such as metabolism, growth, and reproduction. They are also able to respond to their environment and maintain homeostasis. Without cells, plants and animals would not be able to survive and carry out the essential functions needed for life. Therefore, the cell is considered the smallest viable unit of plant or animal life. **

It is difficult to determine which special forces unit has the toughest training as each unit has its own unique and rigorous training programs. However, some of the most well-known and challenging special forces training programs include the Navy SEALs, British SAS, Russian Spetsnaz, and Israeli Sayeret Matkal. These units are known for their physically and mentally demanding training regimens, which include intense physical fitness, combat skills, survival training, and mental resilience. Ultimately, the toughness of a special forces unit's training program is subjective and can vary depending on individual experiences and perspectives. **

The special unit referred to in the text is the Special Weapons and Tactics (SWAT) team. SWAT teams are specialized law enforcement units trained to handle high-risk situations such as hostage rescues, counter-terrorism operations, and armed confrontations. These units are equipped with specialized weapons, tactics, and training to respond to dangerous and volatile situations that regular law enforcement may not be equipped to handle. **

Training for the police mounted unit typically involves both the officers and the horses. Officers undergo specialized training in horse handling, equitation, crowd control, and search and rescue techniques. They also learn how to care for and maintain the health of the horses. The horses themselves undergo training to become accustomed to various environments, loud noises, and crowds. The training is rigorous and ongoing to ensure both the officers and horses are prepared for their duties in the mounted unit. **

The daughter cell may or may not have the same cell type as the mother cell. During cell division, if the daughter cell undergoes differentiation, it may develop into a different cell type than the mother cell. However, if the daughter cell undergoes mitosis, it will be an exact copy of the mother cell and will have the same cell type. Therefore, whether the daughter cell has the same cell type as the mother cell depends on the specific context of the cell division process. **

Training for repairing cell phones typically involves learning about the different components of a cell phone, understanding how to diagnose and troubleshoot common issues, and gaining hands-on experience with repairing various models of cell phones. This training may be obtained through vocational schools, technical institutes, or on-the-job training with experienced technicians. Additionally, some technicians may choose to pursue certification programs offered by cell phone manufacturers or industry organizations to further enhance their skills and credibility. Overall, the training for repairing cell phones focuses on developing the technical knowledge and practical skills needed to effectively diagnose and fix issues with cell phones. **

Unit A is the unit that measures volume, as indicated by the cubic shape in the diagram. This unit is likely either in cubic meters (m^3) or cubic centimeters (cm^3), depending on the scale of the diagram. Volume is a measure of the amount of space occupied by an object or substance. **