Which statement does NOT support the cohesion-tension theory of water transport?
A. Water molecules are strongly cohesive
B. The interior surface of a xylem cell is strongly hydrophobic
C. Water evaporates from the walls of the mesophyll
D. Water molecules are adhesive
E. Transpiration allows the escape of water vapor from a plant through stomata in the leaf surface
Answer: B. The interior surface of a xylem cell is strongly hydrophobic
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If the pond organisms are larvae, rather than adults, Sarah should expect them to have all of the following structures, EXCEPT _____
A) antennae B) an open circulatory system C) an exoskeleton of chitin D) complex eyes E) sex organs
Simple staining and microscopy could easily distinguish the different taxa intermixed within a community of Sarcina, Staphylococcus, and coryneform bacteria
Indicate whether the statement is true or false.
The method of uncovering general principles by carefully using the scientific method is called ________ reasoning.
Fill in the blank(s) with the appropriate word(s).
What percentage of species listed under the U.S. Endangered Species Act are threatened because of competition, predation, parasitism, and herbivory by introduced species?
A) 5% B) 10% C) 20% D) 40% E) 100%