You’re at a picnic enjoying a variety of plant-based foods. You notice that the starchy potato salad tastes great and digests easily, but the fibrous kale salad makes you feel a bit bloated. Curious, you ask yourself: Why can your digestive system break down the starch in potatoes but not the cellulose in kale? Which of the following best explains this difference? A) The human body produces enzymes that can break down starch but lacks enzymes to break down cellulose.B) Starch is water-insoluble, while cellulose dissolves quickly in water, making it indigestible.C) Cellulose molecules are toxic to the human body, so they remain undigested.D) Starch is a simple sugar, but cellulose is made up of complex fats that the body cannot process.

What is a stoma? A. A structure that transports water and nutrients from the roots to the leaves.B. A pore on the surface of a leaf that allows gas exchange.C. A pigment in plants responsible for absorbing sunlight.D. A type of plant cell that provides structural support.    

A gardener accidentally waters a plant with a highly concentrated salt solution. A few hours later, the plant appears wilted, and when observed under a microscope, the plant cells show that their membranes have pulled away from the cell walls, leaving gaps between the cell membrane and the wall. What process is likely causing the plant cells to exhibit this shriveled appearance?        

Which of the following reagents/dyes is NOT used in the detection of carbohydrates, proteins, or fats?  

Why does a lake heat up more slowly than the air around it? 

Which of the following elements has a full valence shell with 8 electrons?  

The University of Arizona’s official T-shirt has a price of $30 per unit. Alice, Billy, and Crist are willing to pay $50, $35, $22, respectively, for one official T-shirt. The total consumer surplus for Alice, Billy, and Crist is:

When the price of a good increases and the quantity demanded decreases, this is an example of 

Suppose that the demand for the Barbie movie is given by Q = 20 – P, and the supply is given by Q = P, where Q is the quantity in thousands of tickets and P is the price. When the price is 12, there will be an ____ of ____ thousand tickets.

Alex is willing to pay $75 for a pair of Nike sneakers. He bought a pair for $55. The sneakers cost Nike $40 to make. What is the consumer surplus?