Botany Lab Help

BIO 2500 Principles of Botany - Kean University, Union, NJ


updated Nov. 1, 2003
About this site Links            Algae quiz Assignment

Reminder:   Bring the two samples of algae that you collected to lab today! Where to collect algae?

World of algae Algae -  diversity  Phytoplankton key
Seaweeds Directory of Algal Images Phycological Images
Algal Microscopy BGSU Economic Uses of Algae Algae World Wide Web Site 
What are Algae?  Algae - common fresh water types Algae - some images
Phycology - images algae - Google images Useful algal links
Algae of tidepools Algal images - Ohio Univ. algae - images   
protist images
Cyanobacteria U. Wisc. 
Image Gallery
Cyanobacteria Images 
Algae - key
Gleocapsa Gleocapsa - Google images
 Nostoc Nostoc Nostoc images
Nostoc - Google images
Anabaena Anabaena - Google images
Oscillatoria Oscillatoria
Euglena gracilis  Euglena Euglena images + movie
Euglena - Google images
Diatom images Diatoms - composite  grouped Diatoms -- Images database
Bacillariophyceae Pennate and Centric Diatoms
Diatom - Centric -e.m. Diatom Centric Diatoms Google images
diatomaceous earth Centric - diatomaceous earth Diatomaceous earth - Google images
Diatom collection Diatoms - morphology
Red algae Rhodophyta Rhodophyta Images  Rhodophyta images
Porphyra Chondrus crispus  Chondrus crispus
Polysiphonia Polysiphonia tetraspores  Polysiphonia -images and description
Rhodophyta - Google Polysiphonia - Google images
Phaeophyta  Diagnostic Characters of the Brown Algae  Brown algae - images
 Brown algae  Laminaria Fucus - images
Fucus- Goggle images Brown Algae -- (Laminaria and Fucus) Fucus
Chlorophyta Chlorophyta Images Chlorophyta   images
 Green algae Chlorophyta Google images Division Chlorophyta - phylogeny
SPIROGYRA Strands -    Strands Spirogyra
Spirogyra- - Spirogyra Spirogyra
  Spirogyra Pyrenoids Spirogyra vegetative + zygotes
  Spirogyra Conjugation Spirogyra - animated gif - focus
  Spirogyra - optical x.s. chloroplast Spirogyra
diagram + photomicrograph
. Spirogyra - diagram and photo of life cycle Spirogyra
. Spirogyra - animation vegetative cell
?Spirogyra - 404 detail of chloroplast
?Spirogyra  - 404 nucleus  see lect 16
ULOTHRIX Ulothrix Vegetative Ulothrix
 . Ulothrix  Ulothrix
. Ulothrix Ulothrix sp. sporangia
. Ulothrix - chloroplast Ulothrix - Google images
Ulothrix - Ulothrix - Ulothrix - Ulothrix Life cycle  -  life cycle
OEDOGONIUM Oedogonium rings Oedogonium Google images
  Oedogonium images U. Wisc. Oedogonium oogonium + antheridium
  Oedogonium  - diagram   Oedogonium
. Oedogonium  Oedogonium vegetative- pyrenoids and rings
. Oedogonium
 oogonium, antheridium, zoospores
Oedognium - nice
ULVA Ulva Ulva - Google images
Ulva - index - U. Wisc. 

Lab Exercise 10

BIO 2500 Principles of Botany - Kean University, Union, NJ


I selected links that provide images of algae similar to those observed in laboratory. Review the links as you prepare for lab and as you study for your lab exam.

Reminder: Bring the two samples of algae that you collected to lab today! Where to collect algae?

In lab you are asked to focus on four things:

  1. Sample the diversity of the various Divisions of Algae
  2. Select one representative organism from each Division with which you will associate the characteristics of the Division
  3. Determine the Division to which each of the two algae you collected belongs
  4. Learn the pattern of reproduction of selected Green Algae
    • Spirogyra
    • Ulothrix
    • Oedogonium
    • Ulva

Where to collect Algae

The following locations probably will provide a variety of algal samples. Keep your specimens alive (provide conditions similar to those in which you collected the sample) in a jar, plastic bag, etc. that you keep exosed to light and at a temperature similar to that in which the algae were living.
  1. Campus stream -- collect a rock or branch that is covered with green, slimy algal growth.
  2. Aquarium - collect a pebble with green growth on it , or scrape green or blue-green growth from the glass
  3. Tree bark - collect a fragment of tree bark that has green growth on it. Do not confuse moss plants (they are larger, and appear to have macroscopic leafy structures). In contrast, the algae may appear as a crust.
  4. Visit a pond, lake, stream or even a puddle in a local park or near your home and collect some of the "pond scum" floating on the surface, rocks or sticks with green growth on them.
  5. Visit the sea shore and collect macroscopic green, brown or red colored plants, which may be floating freely or growing attached to rocks or shells.
Prepare in advance by looking at the examples on the website, illustrations in your text, and illustrations in other reference books.


              Assignment for Laboratory Exercise 10 -- Algae

1.   Bring the two algae that you collected to laboratory today.
     Complete page 10-3 and display your specimens at your desk.

2.  Examine the materials on display in the room. These will
     include living and preserved specimens representing
     diversity of algae; type specimens for the divisions we will
     study; live and prepared slides illustrating reproductive
     patterns of selected green algae; information from books and
     journals related to these and to the economic importance of
     algae and the ecological role of algae.

3.   Learn the major characteristics of the following division of
     algae and one organism to represent each division:
     Cyanophyta, Euglenophyta, *Diatoms (Chrysophyta), Rhodophyta,
     Phaeophyta, Chlorophyta.

4.   Examine materials present which illustrate biological
     diversity of the Divisions of algae. Recognize how, despite
     the variation illustrated, each representative meets the
     criteria for the division to which it belongs.

5.   Learn cell structure of the Green Algae Ä Spirogyra,
     Ulothrix, Oedogonium, and  patterns of reproduction of these
     and Ulva.

6.   Show me the items on the check sheet (page 10-2) and have me
     initial that page to indicate that you have shown them to

 7.   Prepare for a quiz.