Which of the following is not an example of symbiotic nitrogen fixation?
A. Anabaenea with a water fern
B. Rhizobium with leguminous plants
C. Azotobacter with certain photosynthetic protists
D. Frankia with woody shrubs
Answer: C
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Which function is not mediated through the integumentary system?
A. Protection against infection B. Peripheral circulation C. Fluid control D. Temperature control
How many bones are in the adult human skeleton?
a. 336 b. 26 c. 201 d. 106 e. 206
Four of the five answers listed below are actively involved in nerve impulse transmission. Select the
exception. a. neuroglia b. neuron c. ganglia d. nerves e. tracts
When transporting water up to the top of giant trees, which feature allows water molecules to pull up adjacent water molecules to which they have bonded?
A) low density as a solid B) adhesion C) ionic bonding D) cohesion E) high specific heat