What is an organic chemical?

A. A chemical that makes up rocks and minerals.
B. A chemical that forms parts of living things.
C. A diatomic molecule that exists in gas form.
D. A chemical made of a metal and a nonmetal.
Answer ASAP Please!!

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic