A fossil that can be used as a marker in time is called what? A. An index fossil
B. A fossil record
C. A trace fossil
D. A coprolite

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Which direction does the energy flow in this energy pyramid ?

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous