Ascientist conducts a test and finds out that the ld50 of a certain chemical is 20 mg per kilogram. explain what this means.

Which muscle is responsible for inhalation ?

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.

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?