The carrying capacity of an area for a plant is most likely determined by
A. accumulation of waste products.
B. availability of raw material and energy.
C. constant birthrate.
D. low biotic potential.
B. availability of raw material and energy.
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The top three causes of death in the United States are due to infectious diseases.
a. true b. false
If two nonsister species on the phylogenetic tree above differ from the other two in a single character state (say dark or light fur), how many character state changes (evolutionary events) are needed to explain this pattern?
a. one c. three b. two d. four
All of the following are correctly matched "tissue system - function" except:
A. Ground tissue: anchors and provides support B. Dermal tissue: protects plant C. Vascular tissue: moves molecules and provides support
To determine the validity of 0% sodium chloride (NaCl) broth, which two organisms should be used for quality control purposes?
a. V. alginolyticus and Vibrio cincinnatiensis b. P. damsela and Vibrio harveyi c. Vibrio parahaemolyticus and V. cholerae d. Vibrio vulnificus and P. damsela