What can be used as a molecular clock to estimate the time since organisms diverged from a common ancestor?
A. DNA
B. all types of RNA
C. only ribosomal RNA (rRNA)
D. ATP
E. All answers are correct.
Answer: A. DNA
You might also like to view...
All of the following statements are true about organisms that photosynthesize EXCEPT:
a. They are called producers. b. They are able to convert the sun’s energy into a different form of energy. c. They release oxygen. d. They are all eukaryotes
Enzymes speed chemical reactions by
A. raising the temperature of the surroundings B. lowering the energy required to start a chemical reaction. C. maintaining temperature. D. supplying energy to the reaction process
Which of the following types of molecules contain the most energy per gram?
A. sugar B. carbohydrate C. saturated fat D. starch
It is now possible to analyze the genetics of an in vitro fertilized embryo by
A. fetoscopy. B. amniocentesis. C. chorionic villi sampling. D. preimplantation diagnosis. E. postimplantation diagnosis.