The main role of the liver is to ________.
A. produce bile, which helps the process of digestion
B. absorb nutrients
C. break large food into smaller food bits
D. absorb water
Answer: A
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The ability to taste PTC and other bitter chemicals is controlled by ____
a. hormone levels that change throughout life b. the presence of fats and sugars in the food being eaten c. the amount of PTC exposure as a child d. the amount of capsaicin present in taste buds e. proteins on the surface of receptor cells
If you put chloroplasts in the dark, they can continue to make sugar if provided with
a. NADPH, ATP, and CO2. b. NADPH and ATP. c. CO2 and ATP. d. NADPH, CO2, and ADP. e. water and ATP.
Describe the mutagenic action of the following two mutagens: 5-bromouracil and ultraviolet light
What will be an ideal response?
When an animal cell is placed in a hypotonic solution and water enters the cell via osmosis, the volume of the cell increases until it bursts. This does not happen to plant cells, because _____.
a. certain gated channel proteins embedded in their plasma membranes open as osmotic pressure decreases, allowing excess water to leave the cell b. they have cell walls, which prevent the entry of water by osmosis c. they have large central vacuoles, which provide abundant space for storage of incoming water d. they have cell walls, which provide pressure to counteract the pressure of the incoming water