- (I)Before any species can receive protection it must first be declared as endangered or threatened. (II) For this reason, it is important to determine whether a species is threatened or endangered. (III) No one knows how many new species were discovered. (IV) Unlike a threatened, an endangered species is one that is in danger of extinction throughout a significant portion of its range. (V) Their reproductive rates are lower than their mortality over long periods of time.
I
II
III
IV
V
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