Question: If a species of plant or animal ceases to exist on earth, either by natural causes or by activities of humans, the loss of the plant or animal
Choices:
text: reversible extinction
label: A
text: cannot be undone
label: B
text: reversible
label: C
text: a subspecies
label: D
Answer: B
Fact: if all members of a species cannot produce offspring then that species will likely become extinct