In a minute to win it game cards are placed between cups to stack them. The contestant then pulls the card out and hopes they will end with a set of stacked cups. Why does this work?

There is no friction between the card and the cup

Inertia will keep the top cup from moving very far .gravity will pull one cup on top of the other.

The opening of the cup is so much bigger than the bottom even though the cup moves they will both be stacked together.

Both cups I moved the same amount by the friction between them and the card

For each of the following, decide whether the statement describes photosynthesis, cellular respiration, or both. releases energy in the form of atp. stores energy in glucose molecules. performed by producers. performed by consumers.

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?