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?

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

Isotopes of the same element have differ in their