Bryophytes

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B

RYOPHYTES

The Mosses, Liverworts and

Hornworts

A T

RIBUTE TO

M

OSS

 http://www.youtube.com/watch?v=MWRazeU hg44&feature=player_embedded

L

OCATION

Water vs Land

Algae – mainly aquatic

Moss – damp, shady locations

What challenges do plants have to overcome to live on land?

G

ENERAL

C

HARACTERISTICS

Non-vascular plants (no pipes)

Transport water by osmosis

Found in moist shady areas

One cell thick leaves;

 lack cuticle = more evaporation

G

ENERAL

C

HARACTERISTICS

Rhizoids – anchor to ground

Rhizome – underground stem

Lack true roots, do not play a major role in absorption

Flagellated sperm

B

RYOPHYTES

3 Main types

Mosses

Liverworts

Hornworts

M

OSSES

L

IVERWORTS

H

ORNWORTS

M

OSSES

Class Musci: true moss

Gametophyte dominant

Male and female usually separate

S

TRUCTURE

REPRODUCTION

Similar to algae

Asexual:

Fragmentation

Sexual:

Water transports sperm to egg in moist environment

A

SSIGNMENT

1.

2.

3.

4.

5.

6.

What are the three groups of bryophytes?

Algae live mainly in the water and mosses live on land. What features do mosses have that have allowed them to do this?

What features do more complex land dwelling plants have that mosses lack?

Are the gametes of bryophytes haploid or diploid? Are the spores of bryophytes haploid or diploid?

Describe the life cycle of a moss. You can draw a labelled diagram if you want.

Is the dominant part of the mosses life cycle spent as a sporophyte or gametophyte?

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