External skeleton is the correct answer. Hope this helps out !
Answer:
yo I cannot see the image
Explanation:
50%, don't know if you use pun nett squares but Google them, they simplify it so much.
R. r
r Rr. rr
r Rr. rr
They consist of double-bond and single bond, according to the type of DNA.
Answer: Graphs are diagrammatic representation of relationships.
Explanation: Have a great day!!!! Hope this helps.