The features that distinguish a pond from a lake are .
A)
smaller size and no temperature gradient
B)
smaller size and a temperature gradient
C)
larger size and no temperature gradient
D)
larger size and a temperature gradient

Which part of cellular respiration must occur before any of the other steps can occur

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.

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis