Final answer:
Silk is used in biology for studying silk production and in medicine for sutures and tissue engineering. Wool is studied for its thermal properties and durability.
Step-by-step explanation:
Silk fiber is used in science for a variety of purposes. It is commonly used in the field of biology for studying silk production and the properties of silk fibers. Additionally, silk has applications in medicine, where it is used for sutures and tissue engineering due to its biocompatibility and strength.
Wool fiber also has scientific uses. It is often studied in the field of textiles and materials science to understand its thermal properties and durability. Wool's ability to retain heat even when wet makes it valuable in cold environments.