This illustration shows a kind of animal that is a free-living organism.

what is the common name of the group that contains this organism?

a.
ribbon worms

b.
arthropods

c.
flatworms

d.
roundworms

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.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?