Energy must be transformed in ecosystems because
a.
energy cannot be created or destroyed
b.
an organism’s energy must go somewhere
c.
an organism’s energy must come from somewhere
d.
all of the above

People keep spending additional units of a particular resource on a want until their marginal benefit is  decreasing withgreater thanless thannot affected by  their marginal cost.

The creation of the european union has had all of the following effects except

Choose the false statement. a. some organisms fossilize when frozen or dried out. b. bacteria can destroy dead plants and animals. c. it is common for a plant or animal to fossilize when it dies. d. rapid burial under small-sized sediment increases the chance for fossilization to occur.