What environment is characterized by high nutrient inputs and by relatively great fluctuations in salinity and temperature?

A) A river
B) An estuary
C) A freshwater wetland
D) Aa large lake
E) The oceanic province

After a seed has been produced, it often has a time during which no growth occurs called

A) pre-germination.
B) senescence.
C) suspended animation.
D) dormancy.
E) hibernation.

The Portuguese man-of-war is a colony of hundreds to thousands of:

A) sea anemones
B) ctenophores
C) hydrozoans
D) jellyfish
E) sponges

Which plants resemble palm trees (but are not close relatives) and include the "sago palms" common in landscaping?

A) tree ferns
B) conifers
C) gnetophytes
D) ginkos
E) cycads

The male gametophyte is also called an embryo sac.

The various types of epithelium are classified by

A) the size and shape of cells.
B) the shape of cells and number of cell layers.
C) the number of cell layers and size of the cells.
D) the size and location of cells.
E) function and size of cells.

Humans, as well as all other mammals, have hair. Hair, then, would be considered to be a(n) :

A) derived character.
B) cladistic character.
C) ancestral character.
D) analogous character.
E) polyphyletic character.

Groups of related nerve cell bodies located outside of the central nervous system are called ________.

A) ganglia
B) plexus
C) tracts
D) nerves