What makes the metabolism of Ferroglobus interesting in the context of evolution?
A) Ferroglobus is an anaerobic iron-oxidizing chemolithotrophic autotroph that may represent a key metabolism that allowed for the oxidation of ferrous iron without molecular oxygen.
B) Ferroglobus can use H2 or H2S as electron donors in its energy metabolism and is thermophilic, thus representing the earliest hypothesized forms of life.
C) Ferroglobus lacks cells wall and becomes encrusted in oxidized iron.
D) Ferroglobus is both an iron- and nitrate-reducer and is probably the last common ancestor of all iron- and nitrate-reducing organisms.
Answer: A
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You have been assigned to address a problem of overpopulation of species X in a nearby county. One of the members of your team suggests introducing species Y, which is a natural predator of species X, but not normally found in the area. After some discussion, you go ahead and introduce species Y. What aspects of the hierarchical organization may be affected within a period of a several years?
A. organism, population, species B. population, species, community, biosphere C. population, species, community D. population, community Clarify Question 1. What is the key concept addressed by the question? 2. What type of thinking is required? 3. What key words does the question contain and what do they mean? Gather Content 1. What do you know about hierarchical organization?How does it relate to the question? Consider Possibilities 1. What other information is related to the question? Which information is most useful? 2. If a predator is added which levels of structure would be affected? Choose Answer 1. Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process 1. Did your problem-solving process lead you to the correct answer? If not, where did the process breakdown or lead you astray? How can you revise your approach to produce a more desirable result? 2. This question asked you to predict the impact of a predator on different levels of a hierarchical system.If you got the correct answer, great job! If you got an incorrect answer, where did you get stuck?
Each human ?-globin locus contains two ?-globin genes, ?1 and ?2, and most individuals have two copies of the locus. Which of the genotypes would result in the most severe phenotype? (A"–" represents a deletion allele.)
A) ?1 ?1 / ?2 ?2 B) ?1 – / ?2 – C) ?1 ?1 / – – D) ?1– / ?2 ?2 E) ?1 – / – –
Which of the following statements is false?
a. Transpiration creates tension on water columns in a plant. b. Transpiration is the loss of water in gaseous form from a plant. c. Osmotic gradients account for the absorption of water by roots. d. Transpiration occurs mostly through the cuticle. e. Hydrogen bonds account for the cohesiveness of water molecules.
Which of the following would NOT be considered a synovial joint?
a. hip bone to femur b. elbow c. joints between vertebrae d. shoulder to upper arm e. knee