this is science the question is Mixture A has 3 cups of white paint and 9 cups of green paint. Mixture B has 7 cups of white paint and 21 cups of green paint. Is Mixture A darker, lighter, or the same color as Mixture B?

Why is excretion necessary to maintain homeostasis?

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.

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine