Quiz 12 Questions and Answers

In your writing assignment, you noted a dim reflection of UV/blue light from an intact leaf. Why was the reflection dim rather than bright?
a.) penlight batteries were weak
b.) pigments absorb UV/blue light
c.) chlorophyll does not absorb UV/blue light
d.) fluorescence does not occur
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Why, when exposed to UV/blue light, did the extracted pigments fluoresce a deep-red wavelength?
a.) chlorophyll absorbed UV/blue light
b.) the chlorophyll electron excited by light had nowhere to go but back
c.) deep red light is longer in wavelength, and thus lower energy, than the other colors
d.) all of these
Translocation takes place in: A. Xylem B. Phloem C. Cortex D. Pericycle E. EndodermisPhloemThe transpiration component based on osmosis: A. Root pressure B. Evaporation C. CapillarityRoot pressureThe transpiration component where water molecules climb: A. Root pressure B. Evaporation C. CapillarityCapillarityThe transpiration component providing the most life in a tall tree: A. Root pressure B. Evaporation C. CapillarityEvaporationWhich process depends on H+-pumps and H+-sucrose symport transporters? A. Transpiration B. TranslocationTranslocationHas the highest internal pressure: A. Root phloem B. Leaf phloem c. Apical bud phloemLeaf phloemIn sponges the water export opening: A. Osculum B. Ostium C. Choanocyte D. PorocyteOsculumIn sponges the cell doing the circulation: A. Osculum B. Ostium C. Choanocyte D. PorocyteChoanocyteIn sponges the cell structure driving circulation: A. Microvilli B. Nucleus C. Vacuole D. FlagellumFlagellumCnidarians have just two tissue layers, so they lack: A. Heart B. Vessels C. Hemoglobin D. All threeAll threeIn chitons, bivalves, and insects the circulation is: A. Cyclosis B. Tidal C. Closed D. OpenOpenIn molluscs and insects the circulating fluid is in the: A. Hemoglobin B. Hemocoel C. Heme D. WaterHemocoelIn molluscs and insects the O2 carrier in circulating fluid is: A. Hemoglobin B. Hemocyanin C. HemeHemocyaninMost obviously missing in open circulating systems: A. Artery B. Heart C. Capillary D. VeinCapillaryHemocyanin is an oxygen-carrying protein with this cofactor: A. Iron B. Magnesium C. CopperCopperThe most efficient oxygen-carrying protein: A. Hemocyanin B. Hemoglobin C. HemerythrinHemoglobinThe mammal blood macroelement: A. Zn B. Fe C. Cu D. MgFe