Platyhelminthes have flame cells. what is their significance?
a they in respiration.
b they in excretion.
c they in protection.

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

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.

According to this food web which of the following would be considered primary consumers