Chemists use the term "organic compounds" to refer to molecules that ________
a. contain the carbonyl or carboxyl functional groups
b. are formed entirely of carbon and hydrogen
c. contain primarily carbon and hydrogen
d. are created only in living organisms
c
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The protein of the bicoid gene in Drosophila determines the _____ of the embryo
A) anterior-posterior axis B) anterior-lateral axis C) posterior-dorsal axis D) posterior-ventral axis
All multicellular organisms have a nervous system
A. true B. false
An oak tree can support hundreds of beetles, caterpillars and other primary consumers. This is an example of
A. a pyramid of biomass. B. excessive levels of primary production. C. an unusually diverse group of primary consumers. D. primary parasitism. E. an inverted pyramid.
What region of the brain integrates visceral activities, body temperature, and heartbeat?
A. medulla oblongata B. cerebrum C. hypothalamus D. thalamus E. corpus callosum