Fertilizers are essentially made up of:
A. mostly organic matter
B. different types of soil
C. deficiency amendments
D. minerals
E. plant foods
D. minerals
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The equation, 6CO2 + 6H2O ?C6H12O6 + 6O2, describes which of the following processes?
A. light reaction B. nitrogen fixation C. photosynthesis D. Calvin cycle E. aerobic respiration
Given the following gel, which protein has a more negative charge?
What will be an ideal response?
Each branch of an evolutionary tree represents _____.
a. a mutation b. a speciation event c. multiple speciation events d. a single individual e. an environmental pressure
Which of the following causes of extinction has not been attributed to human activity?
A. habitat loss B. increased carbon dioxide in the atmosphere C. eutrophication D. exotic species E. All of the above.