Four features help define the __________: a notochord, a dorsal hollow nerve cord, a pharynx with gill slits, and a tail extending past the anus.
Fill in the blank(s) with the appropriate word(s).
chordates
Biology & Microbiology
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Which evolutionarily ancient brain structure is responsible for the formation of long-term memories, particularly of places?
a. hypothalamus b. hippocampus c. amygdala d. frontal lobe e. occipital lobe
Biology & Microbiology
Cnidarians and ctenophores are similar in that they both have
a. radial symmetry. b. mesoderm. c. a digestive tract with two openings. d. a pseudocoel. e. nematocysts.
Biology & Microbiology
The traditional evolutionary diagrams are in the form
of a. interlocking circles. b. a wheel and spokes. c. a set of parallel lines. d. a tree. e. segmented bars.
Biology & Microbiology
Which of the following lymphoid organs has the immunological function of filtering pathogens from the blood?
A. tonsils B. thymus C. spleen D. lymph nodes E. galt
Biology & Microbiology