A:air
because the flag would on blow if it had some kind of wind
Answer: I believe the answer is B - Nucled Acids.
Hope this helps.
Im pretty sure its guanine
An animal cell lacking carbohydrates on the external surface of its plasma membrane would likely be impaired in CELL TO CELL RECOGNITION.
Carbohydrates have diverse functions, one of their functions is that they serve as a recognition signal at the surface of cells.
Carbohydrates located on the surface of cells enable cells to recognize and communicate with one another.
There heart began to beat faster and their body produce more sweat and there blood is following faet