What best describes why hair gel is considered a noncrystalline solid? Atoms in the hair gel are arranged in a repeating pattern.
Atoms in the hair gel are ionized and can withstand high heat.
Atoms in the hair gel have no particular order or pattern.
Atoms in the hair gel can expand to surround any amount of hair.

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products

Identify the lewis acid in this balanced equation: ag+ + 2nh3 -> ag(nh3)2+a. ag+b. nh3c. ag(nh3)2+

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?