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: Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of what exist? Answer: equilibrium

SOLUTION: Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of equilibrium exist.

PROBLEM: Question: What is the only animal phyla that does not consist exclusively of invertebrates? Answer: chordates

SOLUTION: Chordates is the only animal phyla that does not consist exclusively of invertebrates.

PROBLEM: Question: What intensifies the response during homeostasis? Answer: positive feedback loops

SOLUTION:
Positive feedback loops intensifies the response during homeostasis.