Which of these is an example of commensalism? a. lion hunts an antelope b. hummingbird drinks flower nectar c. wolf and fox fight for the same prey d. barnacles attach to a whale in the ocean

Which of the following statements is true regarding a basic amino acid? a.) the hydrophilic r group of a basic amino acid will be located on the interior of a protein b.) the positively charged r group of a basic amino acid could bind dna c.) the r group of a basic amino acid would only be able to form covalent bonds with other molecules d.) a basic amino acid would be considered both polar and hydrophobic e.) all of the above