What do bacteria have in common with the cells of other living organisms a. they contain paramecium
b. they have all the same internal parts
c. they require cool temperatures to survive
d. they have ribosomes

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water