Which of the following statements most accurately describes the anatomy of a multicellular fungus?
A. Numerous hyphae make up a mycelium.
B. Numerous mycelia make up a hypha.
C. Numerous mycelia make up a fruiting
body.
D. Numerous fruiting bodies make up a
mycelium.
E. Numerous septa make up a hypha.
A
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Refer to the figure. To identify the molecule that accepts CO2, Calvin and Benson manipulated the carbon-fixation cycle by either cutting off CO2 or cutting off light from cultures of photosynthetic algae
They then measured the concentrations of various metabolites immediately following the manipulation. How would these experiments help identify the CO2 acceptor? A) The CO2 acceptor concentration would decrease when either the CO2 or light are cut off. B) The CO2 acceptor concentration would increase when either the CO2 or light are cut off. C) The CO2 acceptor concentration would increase when the CO2 is cut off, but decrease when the light is cut off. D) The CO2 acceptor concentration would decrease when the CO2 is cut off, but increase when the light is cut off. E) The CO2 acceptor concentration would stay the same regardless of the CO2 or light.
In Figure 17.5a, none of the F2 females has white eyes. Why?
A. F2 females have two X chromosomes, and in this cross all F2 females are homozygous for the red-eye allele. B. F2 females have two X chromosomes, and in this cross they all have one X carrying a red-eye allele and another X carrying a whiteeye allele. C. Females can never have white eyes because this allele is recessive. D. The allele for red eyes is dominant over white eyes, and these F2 females are either homozygous dominant (red-eye allele) or are heterozygous. E. Females always have red eyes because this allele is dominant.
Based on the figure, which of the following statements is most likely accurate?
A. HIV arose more than once.
B. HIV and SIV are not genetically related.
C. The SIV strains will all have more sequence similarity with each other than with any of the HIV groups.
D. SIV only arose once.
E. HIV groups M, N, and O will be more similar to each other than to SIV.
Cyanobacteria are thought to be the first organisms to evolve ____.
A. oxygenic photosynthesis B. chemolithotrophy C. aerobic respiration D. fermentation