Subject:
Technology and Livelihood Education
Answer:
What I Know
1.A
2.A
3.B
COMING SOON
The answer you are looking for is chitin.
According to a page that I found with info on the subject,
"All arthropods have bodies divided into segments and covered with a hard EXOSKELETON. This tough casing is made of a protein called chitin, which is also found in human fingernails."
https://www.factmonster.com/dk/encyclopedia/nature/arthropods
Welcome to Brainly!
A gene is a hereditary trait in your body and also apart of your DNA not visible to the naked eye making up how you look