Overharvesting encourages extinction and is most likely to affect overharvesting encourages extinction and is most likely to affect animals that occupy a broad ecological niche edge-adapted species large animals with low intrinsic reproductive rates most organisms that live in the oceans' coral reefs

Overharvesting encourages extinction and is most likely to affect the large animals with low intrinsic reproductive rates. Overharvesting is among the activities threatening the global biodiversity, together with pollution, introduced species, habitat destruction and habitat fragmentation. For example in the marine environments, overharvesting or overfishing leads to depletion of some species to very low numbers and drives others to extinction. 

Twins are born minutes apart, not a year apart. fraternal twins are no more closely related genetically than ordinary siblings born a year apart. they just happen to be born at the same time. identical twins result from a single fertilized egg dividing and separating early in gestation. although identical twins are more similar to each other than other siblings, there is some research to suggest they are not 100% the same. you and your brother share very similar dna because you have the same parents, and you look the same. i'll bet you resemble one or both of your parents, and likely a grandparent or two as well.