Which of the following is an example of a fossil with original preservation? a. a mold of a fish skeleton
b. a coprolite (fossilized feces)
c. a dinosaur footprint
d. an insect embedded in amber

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.

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?