Which statement is true? 1.hiv is the virus that causes aids; there is no cure for hiv. 2.hiv is a bacterial infection that takes over the body's immune system. 3. hiv is transmitted through casual contact with infected people. 4.aids occurs one to two months after infection with hiv.

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.