Depending upon its composition, each type of coal burns differently. the "older" the coal, the harder the coal, and the greater percentage of present. a) carbohydrates b) carbon c) oxygen d) water

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle

Which measure of an earthquake depends on how close you are to the focus?

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.