The vertebrate central nervous system consists of a brain and _________.
Fill in the blank(s) with the appropriate word(s).
spinal cord
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All eutherian mammals possess which anatomical characteristic?
a. stereoscopic vision b. a pouch for young to mature c. homodont teeth d. a complex placenta
The pseudopods of amoebas and certain other cells
are produced by the action of __________ and motor proteins. a. myosin b. microtubules c. intermediate filaments d. microfilaments e. all of these
The accessory glands of the male are the:a
seminal vesicles only. b. prostate gland only. c. bulbourethral glands only. d. seminal vesicles and prostate gland. e. seminal vesicles, prostate gland, and bulbourethral glands.
Which event during the evolution of land plants favored the synthesis of secondary compounds?
A) the greenhouse effect throughout the Devonian period B) the reverse-greenhouse effect during the Carboniferous period C) the association of the roots of land plants and fungi D) the rise of herbivory