Answer:
Sometimes, a mutation that occurs will be beneficial to the species. Through natural selection, this mutation will become more prevalent in this species' genes, thus they evolve to have this trait.
Answer:
TAC GA
Explanation:
Think of it as, TA and GC. No matter what they're both bound together. 'And yeah, the link people suck.
Diversity in the environment and adaptation to changes in it
They replace the lost ions by active uptake through active transport
of ions from the surrounding waters. This is exhibited in freshwater fishes that
actively take in these ions through the gills. Most of the ions involved in osmoregulation in freshwater are those of Na+ and Cl-.
