Which element's isotope is commonly used to determine when biological samples such as fossils, were formed?
A. nitrogen
B. sulfur
C. oxygen
D. carbon
E. hydrogen
Answer: D
You might also like to view...
What is the correct chromosomal condition at prometaphase of mitosis?
A) A B) B C) C D) D E) E
What is the difference between vitamins and minerals?
A. Vitamins cannot be made by our bodies, while minerals can. B. Vitamins are organic nutrients, while minerals are inorganic nutrients. C. Vitamins are inorganic nutrients, while minerals are organic nutrients. D. There are no main difference between vitamins and minerals.
Which gland is associated with daily
biorhythms? a. pineal b. parathyroid c. thymus d. pituitary e. thymus
A functional advantage of having human testes in the scrotum rather than in the abdomen is
A. a shorter sperm duct. B. lower temperature. C. greater protection to the testes. D. lack of room in the abdomen. E. more direct blood supply.