E ima die cuz teachers keep giving us homework and nowhere to read to answer the questions -w- I forgot the image-

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

Achemical substance that people of any age may not lawfully manufacture, possess, buy, or sell is known as a(n) a. over the counter drug b. prescription drug c. medicine d. illegal drug

During polarization, potassium has a blank charge, sodium has a blank ch arge ,and calcium has a b l ank. charge