Part a: interphase
just before meiosis begins, the chromosomes are replicated.
1. use ten beads and a centromere of one color to construct the long
chromosome. use ten beads and a centromere of a second color to construct
the second chromosome in the long pair. make a drawing of the
chromosomes in the space below.
2. for the second pair of chromosomes, use only five beads.

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

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?

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen