How do hetertrophs make energy ? a. they convert carbon dioxide, water, and inorganic compounds into carbohydratesb. they convert into carbon dioxide , water , and organic molecules to carbohydratesc. the obtain nutrition from dead or decaying organismsd. they obtain energy from other organisms

Can someone i have no idea of how to do this.

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 your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?