Choose all the answers that apply. Which of the following are general characteristics of animals? mobility specialized tissue heterotrophic dorsal cords nervous systems cell walls

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

Describe the layers of the suns atmosphere?

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give