Identify the flower parts from their descriptions. A) These grains contain male gametes (sperm cells):

B) This structure contains female gametes (egg cells):

C) This colorful structure attracts pollinators to the flower:

D) This structure has a sticky surface to trap pollen grains:

E) This structure produces and stores pollen:

These structures allow sperm cells to move through the style:

F) This cup-like structure holds the flower:

G) These structures protect the maturing flower bud:

H) This structure contains the female organs of a flower:

I) This structure contains the male organs of a flower:

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 relationship between intron and exon

What class of levers is shown in this image?