Answer:
a) took
Explanation:
Tooken is not a word, and taken is grammatically incorrect in this situation. Therefore, took is the only valid answer.
Answer:
Because a C atom can form as many as 4 other atoms
Explanation:
Debido a que un átomo de C puede formar enlaces covalentes con hasta otros cuatro átomos, es muy adecuado para formar el esqueleto básico o la columna vertebral de una macromolécula.
I believe more of a mysterious tone but im not for sure
