Name: Brieanne Glanville
Date: 1/27/14 Bio 205
Labs 1-2: Exercises 24-25
Exercise 24: Survey of Prokaryotes
a. Why is it important that decomposers such as bacteria release nutrients?
Answer: It is important because they feed on dead organic matter
b. What term best describes heterotrophic bacteria that feed on living tissue?
Answer: The term that describes heterotrophic bacteria are decomposers
Procedure 24.1 Complete these exercises using prepared petri dishes
Question2- Observe bacteria next lab session to answer this question.
a. How many colonies are on your plate?
b. What is the size, color and shape of each bacterial colony?
Complete the table below using microbewiki.kenyon.edu/
Table 24.3 The relative sizes, and shape of common bacteria
Complete the remaining blank by choosing two species of bacteria that are different from the others in the table.
Bacterial species | Gram stain +/- | Relative size | Cell shape |
Bacillus megaterium | + | Small | Rod-shaped |
Rhodospirillum rubrum | - | Small | Spiral-shaped |
Escherichia coli | - | small | Rod-shaped |
Staphlococcus epidermis | + | small | Grape like clusters |
Yersinia | - | small | Rod-shaped |
Vibrio | - | small | Largely Halophilic |
Look up pictures of colonies the bacteria listed below. Copy and paste website address into this document. Source:
Table 24.4 An evaluation of colony morphology.
Colony # | Species | D(mm) | Color | margin | form | elevation |
1 | Bacillus megateriumhttp://dept.kent.edu/microbiology/htm/organism.htm | | Beige/White | smooth | pinpoint | flat |
2 | Rhodospirillum rubrumhttp://commtechlab.msu.edu/sites/dlc-me/zoo/zwp0257.html | | Red | Entire | pinpoint | convex |
3 | Escherichia colihttp://www.britannica.com/blogs/2011/06/evil-coli/ | | Translucent | Undulate | pinpoint | Slightly raised |
4 | Staphlococcus epidermishttp://faculty.ccbcmd.edu/courses/bio141/labmanua/lab6/gpstaph.html | | Off-White |...