Two unlabeled slides are viewed under a microscope. Slide a has cells with a visible nucleus, mitochondria, a cell membrane, a cell wall, and chloroplasts. Slide b has cells with a visible nucleus, mitochondria, and a cell membrane. How should these slides be labeled?.

If many different species live in an ecosystem, this the ecosystem to fill its a. populations b. niches c. producers d. communities

What feature of cell theory is best demonstrated in the image

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