Examlex
Which of the following would not be required for the purpose of determining the sequence of a 400-base-pair DNA fragment by the standard ddNTP sequencing method?
Allantois
An extra-embryonic membrane in birds and reptiles, involved in gas exchange and waste storage during development.
Amnion
A membranous sac that surrounds and protects an embryo or fetus in the amniotic cavity of vertebrates.
Yolk Sac
An extra-embryonic membrane in many vertebrates that provides food for the embryo via absorbed nutrients.
Gas Exchange
The biological process through which organisms exchange oxygen and carbon dioxide with their environment, typically occurring in the lungs or gills.
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