Answer true or false 1. Robert Hooke was the first person to see cells.
2. Bacteria cells have a cell membrane.
3. Plant cells have cytoplasm.
4. Cells taken from fungi do not have DNA.
5. Cells can only come from pre-existing cells.
6. The framework of the cell is called the cytoplasm.
7. The outer boundary of the cell is the cell membrane.

How many chromosomes are in a gold fish?

Which blood cell spend most of their time in the lymphatic system?

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?