Cells in organisms need food, air, and waste removal. how are these needs met? a. each cell must specialize in all of these functions. b. organs and tissues perform these functions for the cells. c. cells share their waste with other cells. d. cells get their food from the air and sunlight around them.

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

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.

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only