Which of the following is not important in getting oxygen from the alveoli into the capillaries?
A. The difference in oxygen concentration in the blood compared to the alveoli
B. The number of alveoli and capillaries present
C. The thickness of the capillary-alveolus wall
D. The number of nitrogen molecules present in the lungs
D. The number of nitrogen molecules present in the lungs
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Certain properties of water—its cohesion, surface tension, and resistance to temperature change—are all:
A. a function of the partial negative charge on the H atoms of a water molecule. B. a function of the hydrogen bonds within a water molecule. C. a function of the hydrogen bonds between water molecules. D. a function of the non-polar covalent bonds between the H and O atoms within a water molecule.
Contained in amino acids, proteins, nucleic acids, chlorophyll.
Choose the letter of the best match: A. nitrogen B. calcium C. potassium D. phosphorus E. magnesium
FALSEA sperm or egg has twice as many chromosomes as its parent cell.
a. true b. false
_________ speciation occurs within a species in a single geographic area.
Fill in the blank(s) with the appropriate word(s).