Explanation: Density is a property that helps in determining the ocean water's vertical position. This density is controlled by the two factors, such as-
Temperature.
Salinity.
Temperature is inversely proportional to density, but salinity is directly proportional to density. This means that higher temperature waters are less denser than lower temperature water. And high salinity waters are more denser.
The denser water are found in the Antarctic region, as the temperature is low there and salinity is high. And normally near the surface the waters are relatively warm than at deep sea, due to the receiving of maximum sunlight. As we go down into the ocean, the water temperature decreases.
The answer would be b. Crossing over simply creates a higher amount of genetic variation within the daughter cell which is advantageous to sexually reproducing organisms.
Luria broth contains yeast concentrate so it would show a marked B- galactosidase activity which is an enzyme that catalyzes the hydrolysis of B- galactosides including lactose and it is the first step of lactose fermentation.
