Read the sentence from "Black Hole Beginnings."
Under the force of its own weight, the gigantic ball presses
inward
What question should readers ask to determine the cause
in the sentence?
How much does the ball weigh?
Why does the ball press inward?
What does the weight of the ball do?
How does the ball produce force?

What macromolecule is produced during translation? a. carbohydrate b. rna c. dna d. protein

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?

Which of the following cognitive skills have not been displayed by animals? a. using tools b. forming concepts c. transmitting culture d. using syntax