The answer is.d. stromatolites hope it help
Answer:
if the questions are They both provide structural support, but only insulin is a carbohydrate.
They both store energy, but only glucagon is a carbohydrate.
They are both hormones that regulate blood-sugar levels.
They are both hormones that help fight disease
I can only confirm the answer isnt the first choice i think its the 2nd
Explanation:
20. The answer is 1 (Precambrian)
21. The answer is 4 (Pennsylvanian)
22. The answer is 2 (Bony Fishes, Dinosaurs, and Mammals)
23. The answer is 2 (Reptiles)
Answer:
the paired bases( nitrogenous bases )
