A vesicular felsic rock is called a:
a. pumice.
b. scoria.
c. obsidian.
d. tuff.
e. volcanic breccia
A
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A variety of oranges that have been selectively bred to be juicer and sweeter are a result of
A. natural selection. B. artificial selection. C. adaptation. D. reproductive isolation. E. differential reproduction.
Warm advection is most likely to occur:a
in the center of a cut-off low. b. from the surface up to the 500 mb level ahead of an advancing warm front. c. behind a cold front. d. where the winds back with height. e. on the western side of a shortwave trough at the 500 mb level.
Which of the following domains has cells that house DNA in a discrete nucleus and contain structures that supply energy to build the cell and maintain its functions?
A) Archaea B) Archaeabacteria C) Bacteria D) Ediacaria E) Eukarya
Solids in wastewater treatment are removed in ________
A) tertiary treatment B) pretreatment C) secondary treatment D) sludge digestion E) primary treatment