Why does vapor pressure decrease when intermolecular forces increase?

The higher the intermolecular forces between liquid particles, the harder it is to escape the vapor phase, therefore, it is difficult for the liquid to exit as vapor, meaning less vapor, resulting in lower vapor pressure.

What are two examples of genetic change that causes genetic variation?

Mutations and independent assortment are two examples of genetic change that lead to genetic variation. Mutations can change the nucleotide sequence that could lead to a change in the phenotype. Independent assortment increases gamete diversity in the cellular level during meiosis as genes of different pairs of homologous chromosomes randomly combine.

___ a lot of people in my life that have always done everything to help me reach my goals. What is the correct answer to this grammar question? a) There were b) They were c) They have been d) There have been

The correct answer to this question is d) There have been. There have been a lot of people in my life that have always done everything to help me reach my goals.