Lichens and Bryophytes

Lichens and Bryophytes

LICHENS

A. http://ocid.nacse.org/lichenland/html/meeting.html

1.  What forms when a compatible alga and fungus meet?

2.  What are some ways we use lichens?

B. http://www.backyardnature.net/lichens.htm

1.  What is a lichen?

2.  How does the fungi benefit from the algae?

3.  How does the algae benefit from the fungi?

4.  What is this type of relationship called?

5.  What is the name given to the main body of a lichen?

6.  Click on each of the three basic types of lichens and then look at the lichen in the foil pan. Which type of lichen do you think it is?

7.  Describe at least two ways in which lichens are important to the environment.

BRYOPHYTES

C. http://www.rbge.org.uk/science/cryptogamic-plants-and-fungi/bryology

1.  What are the three groups represented in the phylum Bryophyta?

2.  Describe some ways that bryophytes are important.

ALTERNATION OF GENERATIONS

D. http://www.sumanasinc.com/webcontent/animations/content/moss.html

Click on Introduction

1.  Name some general characteristics and members of Bryophyta.

Before clicking on Animation read the following:

Haploid= number of chromosomes in sex cells or gametes (1n or n). You have 23 chromosomes in each of your sex cells.

Diploid= number of chromosomes in body cells (2n). You have 23 PAIRS of chromosomes in your body cells.

Click on Animation and watch and listen to the narration of the entire clip before answering the following questions (repeat the animation to answer the questions, if necessary):

2.  Which form is the haploid form, the gametophyte or the sporophyte?

3.  What are produced in antheridia?

4.  In which structures are the egg cells produced?

5.  How are the gametes transferred from the male to the female plants?

6.  What does the capsule contain?

7.  What do the spores develop into?

MOSSES

E. http://bryophytes.science.oregonstate.edu/page3.htm

1.  Briefly describe the characteristics of a moss plant.

2.  Why is water necessary for fertilization to occur?

3.  Give two ways that mosses can acquire nutrients.

4.  What are the two main requirements for mosses to be successful?

5.  Name several uses for mosses.

6.  In your notebook make a diagram of a moss plant and label all of the parts. You will be expected to know all the parts of a moss plant.

7.  http://www.andrewspink.nl/mosses/thumbnails.htm#p use this site to attempt to identify the moss in the pan- give your best guess!

LIVERWORTS

F. http://www.backyardnature.net/liverwrt.htm

1.  How long ago did the first liverworts appear?

2.  What are the structures that hold liverworts to the ground?

3.  How are the “leaves” of liverworts different from the leaves of trees?

4.  What are the two kinds of liverworts?

5.  Which kind of liverwort do you think is in the pan?

6.  Describe how asexual reproduction happens in some liverworts.

7.  How did liverworts get their name?

8.  Where are several places that liverworts can be found?

HORNWORTS

G. http://www.hiddenforest.co.nz/bryophytes/hornworts/intro.htm

1.  How did hornworts get their name?

2.  Describe some ways that hornworts different from other bryophytes.