Isn’t it 37.2 trillion cells if that is wrong sorry
with the prey there is always going to be something that is going to eat them it is called the food chain
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)