Which of the following is most directly associated with the theory of evolution?
a. Competition between members of a population for limited resources.
b. Production of large numbers of offspring.
c. Sexual reproduction producing variation in a population.
d. Mutations changing the gene pool.
e. Changing of populations over time.
E
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In which of the following properties are the Archaea more like eukaryotes than the bacteria?
A) size B) microtubules and microfilaments C) translation initiation D) mode of cell division E) both choices C and D
In Engelmann's classic experiment, why were the oxygen-requiring bacteria clustered around the
regions of Spirogyra algae that were bathed in red, blue, and violet light?
a. Chlorophyll is green and thus reflects green light. b. The bacteria were immobile and that is where Engelmann happened to place them. c. Photosynthesis is most active in those wavelengths of light and thus more oxygen is consumed by the algae in those regions. d. Photosynthesis is most active in those wavelengths of light and thus more oxygen is produced by the algae in those regions. e. The most energy-rich wavelengths of light are found at the edges of visible and nonvisible light (ultra violet and infrared).
Matching. Choose the most appropriate response
1. ___ eudicots 2. ___ conifers 3. ___ club mosses 4. ___ cycads 5. ___ ferns 6. ___ monocots 7. ___ ginkgos 8. ___ horsetails 9. ___ mosses, liverworts 10. ___ angiosperm A. have rhizoids, cuticle, and protected embryo sporophyte B. one seed leaf C. non-seed-bearing, heart-shaped gametophytes; spore-bearing leaves with sori D. Lycopodium; cone-bearing sporophyte; free-living gametophyte E. only one species left F. cypress and redwood; heterosporous; mostly evergreen G. confined to tropics or warm, temperate zones; resemble squat cone-bearing palm trees H. two seed leaves I. Equisetum; homosporous; rhizomes present; aerial stems jointed; scouring rushes J. have coevolved with pollinating vectors
Enzymes can be described as: