With their lack of gills, dolphin must surface every 10-15 minutes to breathe using a structure called a blowhole located on the top of its head. young dolphins, when born, also have a small amount of hair on their lips which falls off shortly after birth. which would be the best classification group for a dolphin? a) amphibian b) fish c) mammal d) reptile i think [d]

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey