Which phrase best describes a gene?
(1) a segment of a dna molecule found only in
the body cells of an organism
(2) a segment of a dna molecule found only in
the gametes of an organism
(3) a segment of a dna molecule that contains
the instructions for producing a trait in an
organism
(4) a segment of a dna molecule that contains
the instructions for producing all the
characteristics of an organism

Which is an example of a population?

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.