Which benefit, derived from biodiversity, would be categorized as an ecosystem service?
a. the anticancer drug Taxol, derived from the yew tree
b. plants and fruits that are edible by humans
c. cotton and other useful plant-derived fibers
d. decomposition of wastes
e. wild organisms as a source of genes for genetic engineering
ANSWER: d
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Place the steps of biofilm formation in the correct order. _____ Surface (substratum) is preconditioned by environmental molecules. _____ Quorum sensing and the establishment of the extracellular matrix commences as microbes attach more stably. _____ Biofilm matures and some microorganisms escape to the planktonic state. _____ Microbes attach and detach from the preconditioned surface.
Fill in the blank(s) with the appropriate word(s).
Which of the following are symptoms and signs of
Luft’s Syndrome? a. high oxygen consumption. b. constant fever. c. flushed skin. d. weakness. e. all of these.
Darwin might have made even greater advances in his theory if he had:a
understood the work of Gregor Mendel. b. read the works of Malthus. c. done experiments in plant structure. d. read of the work of Charles Lyell. e. understood the theories of Jean Baptiste de Lamarck
Which of the following is NOT a property of water?
a. It is a good solvent. b. It is denser when frozen than when liquid. c. It is cohesive. d. It can be found as a solid, liquid, or gas.