B. some species die out when environmental changes occur
The diagnosis will be variant creutzfeldt jakob disease or as called as vCJD. The variant creutzfeldt jakob disease is an intermittent and fatal human neurodegenerative illness. The ingestion of food of bovine origin contaminated with the agent of bovine spongiform encephalopathy which is a disease of cattle and has been strongly connected to the existence of vCJD in humans.
The first one should be mM
Introns because they are coding sequences.
Exons because they are non-coding sequences.
