The parasitic lampreys, living members of the ____ lineage, have shards of cartilage that partially cover the nerve
cord, which may represent an early stage of the evolution of vertebrae.
a. Petromyzontoidea
b. Placodermi
c. Cephalochordata
d. Urochordata
e. Myxinoidea
ANSWER: a
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The KN-1 gene in maize is normally expressed in ____
a. in primary meristems, where it initiates the process of differentiation b. in apical meristems, where it maintains the undifferentiated state c. in apical meristems, where it initiates the process of differentiation d. in primary meristems, where it maintains the undifferentiated state e. in lateral meristems, where it initiates the process of secondary growth
What are the primary structures for modifying and packaging of cellular secretions for export from the cell?
a. Golgi bodies b. ribosomes c. mitochondria d. lysosomes e. chloroplasts
Creation of a special, resistant zygospore during sexual reproduction is characteristic of members of
which fungal phylum?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
In an open circulatory system, the fluid pumped is called ____.
A. hemoglobin B. lymphatic fluid C. hemolymph D. blood E. capillary fluid