Which of the folllowing describes Proteobacteria in domain Bacteria?
A. phylum
B. class
C. species
D. genus
Ans: A. phylum
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Plants can have ___________ defenses, which are always active, or _________ defenses, which are produced only when a plant is threatened
A. inducible; constitutive B. constitutive; inducible C. chemical; mechanical D. mutualistic; symbiotic
Photoperiodic plants react to a certain amount of darkness, referred to as ________ (three words)
Fill in the blank(s) with correct word
An organism is found to be almost unchanged from its 200 million year old fossil. This is an example of ____.
A. stasis B. coevolution C. mass extinction D. adaptive radiation E. idealized design
The bony movable ?ap that covers the gills and gill slits is called the
a. operculum. b. cranium. c. tympanum. d. colon.