Answer:
A. the cell membrane protects the cell
The food chain would most likely collapse slowing, without a producer other animals cannot get the needed nutrients required to survive.
DNA stores the instructions (genetic information) used to build proteins.
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)
The best answer here is they show seasonal difference in flowering. if they self pollinated they could still interbreed assuming they flower in the same seasons
