Which of the following organisms is using sulfur as a source of energy?
A) Thiobacillus: H2S ? S0
B) Desulfovibrio: SO42- ? H2S
C) Proteus: Amino acids ? H2S
D) Redwood tree: SO42- ? Amino acids
E) Photosynthetic bacteria: H2S ? S0
A
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In the food chain below, what does the garden spider represent? crabgrass—cricket—garden spider—blue jay—red-tailed hawk
A. herbivore B. primary producer C. primary carnivore D. secondary carnivore E. detritivore Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about trophic levels? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Sulfonamides are analogs of PABA and, as a result, they inhibit ________ synthesis.
A. folic acid B. DNA C. RNA D. protein E. phospholipid
Fick's law states that:a
the amount of gas diffusing across a membrane depends on differences in partial pressure. b. the total pressure of a mixture of gases is the sum of the pressures of the individual gases. c. the dissociation of oxygen from hemoglobin depends on the pH of the environment. d. as oxygen concentration increases, there is an increase in the amount of hemoglobin produced. e. the size of an animal varies inversely to the amount of diffusion across its respiratory membranes
Clownfish live within the tentacles of sea anemones. The anemone protects the fish from predators, and the clownfish cleans the anemone. This relationship is an example of
A) parasitism. B) predation. C) succession. D) mutualism. E) competition.