Adisturbance is any relatively discrete event in time that does which of the following?

a. disrupts ecosystem, community or population structure
b. changes resources, substrate availability, or the physical environment
c. facilitates succession
d. all of the above
e. both a and b

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.)chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Where in the cell are ribosomes made?