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.

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

A: Chordates is the only animal phyla that does not consist exclusively of invertebrates.
****
Q: Question: When does exchange of dna segments happen between non-sister chromatids of homologous chromosomes? Answer: during crossing-over

A: Exchange of dna segments happens between non-sister chromatids of homologous chromosomes during crossing-over.
****
Q: Question: What kind of pipettes are suitable for measuring very small amounts of liquids? Answer: micropipettes

A:
Micropipettes are suitable for measuring very small amounts of liquids.
****