How does the plasma membrane of bacteria and archaea differ?
A) Archaea build only lipid monolayers.
B) Bacteria have phospholipids built from branched fatty acids.
C) Archaea have phospholipids built from branched fatty acids.
D) Bacteria build only lipid monolayers.
E) Archaea have phospholipids built from linear fatty acids.
Answer: C
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Jacques Monod spoke of the "postulate of objectivity," which assumes that forces and phenomena in nature:
A. are not consistent. B. cannot be predicted. C. follow consistent rules. D. often create different outcomes.
The cell membrane can be described most accurately as
A) permeable to all small molecules and ions but impermeable to larger ones. B) permeable to only larger molecules. C) permeable to some molecules and impermeable to others. D) impermeable to all polar molecules. E) permeable to all molecules.
If a stream has an average depth of 3 meters, an average width of 4 meters, and an average stream velocity of 0.24 m/s, what is the discharge rate or streamflow (Q)?
A) 0.187 m3/s B) 3 m3/s C) 12 m3/s D) 48 m3/s
The most productive region of a lake is the ____ zone
a. neritic b. limnetic c. profundal d. littoral e. oceanic