I believe the answer is B. They were no longer able to acquire the necessary characteristics for survival in a changing environment. I think it is B. because trilobites mostly went extinct because of the event that wiped out 95% of Earth's species. So they didn't have the characteristics to survive. Hope I helped!
Fatty acids vary in their degree of saturation or unsaturation due to their number of :Double bonds
Animals are <u>consumers</u> and hence they depend on other organisms (plants and other animals) for their food.
The answer is called the Medulla oblongata. Please help me now as saying this is the brainiest answer, thanks.
