When dense seawater sinks below lighter fresh water we observe a condition called:
a. downwelling.
b. salt wedge.
c. tidal overmixing.
d. upwelling.
e. convection current.
C
You might also like to view...
Which group of animals has one-way flow of air through its lungs, whereas all the others have tidal flow?
A. mammals B. amphibians C. birds D. reptiles
Four of the following are characteristic of morphogens. Which one is the exception?
a. They are long-range signals in pattern formation. b. They are encoded by master genes. c. They affect gene splicing. d. Their concentration decreases with distance from source. e. They affect development.
Barrier methods of contraception protect individuals from STDs
Indicate whether the statement is true or false
Macromolecules that are used by most organisms to store hereditary information are called:
A. transfer RNA molecules. B. proteins. C. messenger RNA molecules. D. DNA molecules. E. ribosomal RNA molecules.