The primary elements making up living organisms are
A. carbon, hydrogen, iron, sulfur, sodium, and calcium.
B. carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus.
C. carbon, hydrogen, oxygen, calcium, iron, and iodine.
D. carbon, oxygen, iron, chlorine, sulfur, and phosphorus.
E. carbon, oxygen, sulfur, calcium, iron, and phosphorus.
B. carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus.
You might also like to view...
Oogeneis is a gametogenic process following ________ that produces _______
A. binary fission ; sperm cells B. mitosis ; egg cells C. meiosis ; egg cells D. meiosis ; sperm cells E. mitosis ; sperm cells
When 10,000 molecules of ATP are hydrolyzed to ADP and i in a test tube, about half as much heat is liberated as when a cell hydrolyzes the same amount of ATP. Which of the following is the best explanation for this observation?
A) Cells are open systems, but a test tube is an isolated system. B) Cells are less efficient at heat production than nonliving systems. C) The reaction in cells must be catalyzed by enzymes, but the reaction in a test tube does not need enzymes. D) Reactant and product concentrations in the test tube are different from those in the cell.
Which molecule below does not act as a neurotransmitter and a hormone?
a) thyroid hormone b) glycine c) dopamine d) glutamate e) eicosanoids
Explain why decomposers and detritus feeders are so important to ecosystems
What will be an ideal response?