TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: What branch of science is based on the modern atomic theory, which states that all matter is composed of atoms? Answer: chemistry

SOLUTION: Chemistry is based on the modern atomic theory, which states that all matter is composed of atoms.

PROBLEM: Question: What begins approximately six weeks after fertilization in an embryo? Answer: ossification

SOLUTION: Ossification begins approximately six weeks after fertilization in an embryo.

PROBLEM: Question: Stirring, surface area, and temperature affect the rate at which what occurs? Answer: solute dissolves

SOLUTION:
Stirring, surface area, and temperature affect the rate at solute dissolves what occurs.