Elements on the periodic table are arranged in groups because they have similar properties. these similar properties are the result
a. having the same number of neutrons in their nuclei
b. having the same number of valance electrons in their outer energy levels
c. having the same number of protons in their nuclei
d. having the same atomic masses

If you answer this i"ll give you brainiest and all these points me if you do i love you 7. a doctor is at work taking care of sick patients. she spends a few minutes trying to figure out why a particular patient is sick. she taps the patient's knee to test his reflexes. while she is examining him, the patient coughs on her. a) describe the function of the skeletomuscular system in this situation. (3 points) b) describe the function of the circulatory and respiratory systems in this situation. (3 points) c) describe the function of the immune system in this situation. (3 points) d) describe the function of the nervous system in this situation. (3 points) e) describe one way that any two of the doctor's body systems worked together in this situation. (3 points)

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

When the cell concentrates potassium within, against the natural tendency of matter, it is performing a.passive diffusion b.facilitated diffusion c.active transport d.pinocytosis