Stiffness in the neck can make it difficult for drivers to look behind when they are backing up.
Answer:
A.) or C.)
Explanation:
Idk what is it i think it is C.) i hope am right
B.produce antibodies when triggered by antigens
Barry's antibodies are ab while Anna's antibodies are b
Answer: It's known as the continental drift :)
Explanation: "Pangea's existence was first proposed in 1912 by German meteorologist Alfred Wegener as a part of his theory of continental drift. Its name is derived from the Greek pangaia, meaning “all the Earth.”" (copied from google)