Michael is giving a presentation on the ecological pyramid of numbers. Help him complete the sentences. In the pyramid of numbers generally, the
are the highest in number. Therefore, they occupy the base of the pyramid. The subsequent trophic levels where the numbers of organisms decrease occupy the upper levels. However, pyramid of numbers does not prove useful in most of the cases. Scientists have to
the number of organisms in each trophic level, which is a difficult task.

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

Monitor and apply fix up stratorgies

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.