Practical Exam – Bio 125 Lab

laboratory Due November 14, 2012 Practical Exam 1. a. The symbionts (Paramecium) of the termite belong to the kingdom division Protista b. Paramecium living in the intestines of termites breaks down the cellulose walls of wood fibers releasing proteins that be absorbed by the termites digestive sy motif. Paramecium benefit by having an milieu to thrive and they ingest the wood fibers for their own nutrition as well. 2. c. An beta ecological effect of diatoms is that when they die they hold onto CO2 trapped within their silicon skeleton, carrying it to the ocean floor instead of being released into the atmosphere. . Autotrophic 3. dickens characteristics that helped identify the euglena were e. Two flagellas. f. Eyespot. 4. g. The bacteria in the envisage labelled 4 is rod-shaped. h. Cyanobacteria argon important producers of Nitrogen in marine environments. 5. i. Lactobacillus tack in saliva produced lactic acid to cause Snyders specialty to change color. j. The tube turned yellow after it was exposed to saliva. 6. k. sanguine 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. 7. 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 pullulate and form hyphae. 8. o. The employment of gills in basidiomyctes is to produce spores. p. Basidiomycetes contain crosswalls (they are septate). 9. q. Yeast produces CO2, which makes dough rise. .Yeast ferment alcohol in brewing. 10. s. In mosses, the petallike green structure is the gametophyte. t. Gametophytes are haploid. 11. u. The plant pictured and labeled calculate 11 has vascular tissue. v. Sori are the sporangia structures comprise on the undersides of the fronds. 12. w. The cone labeled 12 is a female cone. x. The needle-like leaves of gymnosperms reduce the surface area, and thick plate and sunken stomata minimize water loss. 13. y. Body plan (c) shown on blackboard labeled 13 represents an acelomate. z. Hydras and jellies exhibit radial symmetry. 4. . Eyespots in flatworms like planaria detect light and use them to move away from light sources. . The immersion of sense organs at the preceding of this organism is cephalization. 15. . Annelids much(prenominal) as the Earthworm, which was dissected in lab, have closed circulatory sy stems. . The digestive portion is complete because the digestive tract runs from mouth to anus.16. . The clitellum of the Earthworm is used in sexual reproduction. . Coelom in Earthworms aid in locomotion and function as a hydrostatic skeleton. 17. The function of hemolymph in an organism such as the Grasshopper is to transport nutrients. . Insects have 3 pairs of walking legs. 18. . crawdaddy have an open circulatory system. . Male ecrevisse are for the most part bigger than females and have bigger claws. Also in male crayfish the two most anterior swimmerets are enlarged and hardened. 19. . The Perch is a vertebrate. . The lateral line organ is used to sense vibrations and pressure differences in water. 20. . The swim bladder in the Perch is used to maintain buoyancy. . caudal fin is primarily responsible for propelling the fish forward. 1. . The front station of the mouth in the Perch is advantageous because it allows the Perch to eat and let in in water as it swims forward. . No, most fish utilize international fertilization to sexually reproduce.22. . Rat belongs to class Mammalia. . Possess hair do of keratin. 23. . Yes, cephalization is apparent in the rat. . Cephalization is the concentration of sense organs at the anterior of an organism. 24. . Rat has a closed circulatory system. . Most rats utilize immanent fertilization du annulus sexual re production. 25. In plants the apical meristem can be found at the . Root tips Shoot tips 26. . The experiment of a Carnation place into a beaker full of water and red food coloring exhibit cohesion, adhesion and capillary action (transpiration) of water through the stem. . Xylem is the vascular tissue mainly involved in this process.27. . The leaves on blackboard labeled 27 are compound. . The leaves are from a dicot because they are arranged in fives. 28. . The picture on blackboard labeled 29 is a monocot leaf. . The name of the cell at the closedown of the arrow is a guard cell. 29. . The picture on blackboard labeled 29 is the stem of a dicot. The vascular bundles are arranged in a ring in the cross-section of the stem. 30. . The secondary xylem growth rings of the woody stem can be counted to determine the age of a tree. . In the picture on blackboard labeled 30, the function of the structure at the end of the arrow is active xylem. This allows for water transport in the tre e. Extra character reference 31. Two structural hallmarks of organisms classified mollusks are muscular foot and mantle. 32. . Rhotifer is the smallest sensual that has tissues and organs/organs systems. . The majority of these organisms reproduce by parthenogenesis.