Biology Lab: Practical Exam

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BIO 125 Lab
Due November 14, 2012

Practical Exam

a. The symbionts (Paramecium) of the termite belong to the kingdom Protista b. Paramecium living in the intestines of termites breaks down the cellulose walls of wood fibers releasing proteins that are absorbed by the termites’ digestive system. Paramecium benefit by having an environment to thrive and they ingest the wood fibers for their own nutrition as well. 2.

c. An important ecological effect of diatoms is that when they die they hold onto CO2 trapped inside their silicon skeleton, carrying it to the ocean floor instead of being released into the atmosphere. d. Autotrophic

3. Two characteristics that helped identify the euglena were: e. Two flagellas.
f. Eyespot.
g. The bacteria in the picture labeled #4 is rod-shaped. h. Cyanobacteria are important producers of Nitrogen in marine environments. 5.
i. Lactobacillus found in saliva produced lactic acid to cause Snyder’s medium to change color. j. The tube turned yellow after it was exposed to saliva. 6.
k. Red algae have phycobilin pigments (phycoerythrin and phycocyanin) that mask the color of the chlorophylls. Brown algae have xanthophyll pigments that mask the green color of the chlorophyll. Green algae have cholorphylls a and b that give a bright green color. l. All algae have chlorophyll.

m. The hyphae of Rhizopus are coenocytic.
n. Gametangia (hyphae fuse), plasmogomy occurs, karyogamy occurs forming Zygosporangium, sporangium form and haploid spores are released to germinate and form hyphae. 8.
o. The function of gills in basidiomyctes is to produce spores. p. Basidiomycetes contain crosswalls (they are septate). 9.
q. Yeast produces CO2, which makes dough rise.
r. Yeast ferment alcohol in brewing.
s. In mosses, the leafy green structure is the...
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