Gradually, in the late 1970s and 1980s, food scientists began breeding livestock that was leaner are supposedly healthier. They could even produce eggs that had higher levels of omega-3 fatty acids by feeding hens

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.