Question 12

a is not a mixture.

a)colloid

b)compound

c)suspension

d)solution

compound (I think)

Explanation:

A compound is not a mixture because a mixture contains two or more substances that are not chemically bonded together. A compound are two or more atoms chemically bonded together.

B) Compound is not a mixture.

Explanation:

In science, a mixture is a material comprised of at least two unique substances that are physically joined. It is the physical mix of at least two substances in which the characters are held and are blended as the solution, suspension, and colloids.  

They are one result of precisely mixing or blending concoction substances, for example, components and mixes, without compound holding or other synthetic change. So, every fixing substance holds its very own synthetic properties and features.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.