The C/N ratio of litter is important because litter with a
A) high C/N ratio does not contain enough nitrogen for decomposers, resulting in immobilization.
B) low C/N ratio does not contain enough nitrogen for decomposers, resulting in immobilization.
C) high C/N ratio cannot be utilized by most organisms without extra carbon available.
D) low C/N ratio cannot be utilized by most organisms without extra carbon available.
A
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High temperatures increase reaction rates but lower rubisco selectivity for CO2 versus O2. High leaf temperatures thus __________
A. increase photorespiration rates B. decrease photorespiration rates C. increase respiration D. decrease RuBP carboxylation E. increase RuBP carboxylation
Continental crust is composed mostly of iron and magnesium
Indicate whether the statement is true or false
The distribution of cytoplasm to daughter cells is accomplished during
A) mitosis B) meiosis C) cytokinesis D) karyokinesis
In a compound microscope, the lens that directs light into the eye is the (ocular/condenser/objective) lens.
Fill in the blank(s) with the appropriate word(s).