There are four main plant divisions: Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms. Bryophytes are the closest relatives to algae and include non-vascular plants like mosses, liverworts, and hornworts. They reproduce via spores and have a dominant gametophyte generation. Pteridophytes are vascular plants like ferns that reproduce via spores produced in sori located on fronds. They have a dominant sporophyte generation.

1. PLANT
DIVERSITY
GRADE 11
MURIVHAMI RV

2. THERE ARE FOUR PLANTS
DIVISIONS
1. 1. Bryophytes
2. 2. pteridophytes
3. 3. Gymnosperms
4. 4. angiosperms

3. BRYOPHYTES

4. BRYOPHYTES
+ They are the native plants that evolved from the algae.
+ The term bryophytes refers to all land plants without
true vascular tissues
+ They are non-vascular
+ The examples includes mosses, liverworts and hornworts
+ They have the gametophyte generation as a dominant
generation.

5. BRYOPHYTES
CONTINUED
+ Their dominant generation is
the gametophytes meaning their
prominent longer-lived plants is
a gametophytes
+ REMEMBER gametes divides
by meiosis which means the
number of chromosomes get
from diploid 2n to a haploid n

6. BRYOPHYTES
the sporophytes ( diploid) only
appears occasionally

7. CHARACTERISTICS
OF BRYOPHYTES
+ They are dependent on water
for reproduction.
+ They alternate with generations,
the sporophyte and
gametophyte generation.

8. Bryophytes
labelled
diagram

9. USES OF THE
BRYOPHYTES
1. Medicine
2. 2. cosmetics
3. 3. food for animals
4. 4. as habitation

10. PTERIDOPHYTES
EXAMPLES INCLUDES
THE FERN PLANT

11. PTERIDOPHYTES
+ They are vascular which means they
have true roots, xylem and phloem to
transport water.
+ Their most dominant generation is
the sporophyte generation.
+ They have true leaves called the
fronds.
+ The fronds are characterised with
leaflets also called the pinnate
+ They depend on water for
reproduction

12. PTERIDOPHYTES LABELLED
STRUCTURE

13. PTERIDOPHYTES

14. FUNCTIONS
+ Rhizome is a horizontal stem like
structure that is responsible for
Anchorage and support of the plant.
+ Fronds contains sori that is responsible
for disposal of spores for reproduction.
+ Spores they serve as means of
reproduction in plants they are produced
by the sporophyte generation
+ Sori they contain sporangia that produces
spores

15. Test your knowledge

17. Questions
1. How many plant divisions are there
2. 2. Name all the plant divisions
3. 3. which of the mentioned plant divisions are closest to
algae by development.
4. 4. give 3 examples of the bryophytes plant
5. 5. name the dominant generation in the bryophyte
6. 6. give an example of the pteridophyte division
7. 7. write down the function of a frond.

19. ANSWERS
1. 1 FOUR (4)
2. 2. BRYOPHYTE PTERIDOPHYTE,GYMNOSPERM,
ANGIOSPERMS
3. 3. BRYOPHYTES
4. 4. MOSS, LIVERWORTS, HORNWORTS
5. 5. GAMETOPHYTES
6. 6. FERNS
7. 7. THEY HAVE SORI THAT CONTAINS SPORANGIA
FOR SPORES

20. REFERENCES

21. REFERENCES
1. 1. Damnjanovic I ( 2016). The bryophytes power point presentation from slideshare at The
Bryophytes (slideshare.net)
2. 2. Sumitachoudhary(2017) General characteristic of the pteridophytes power point
presentation from SlideShare at hthttps://www.slideshare.net/sumitachoudhary/pteridophyte
3. 3. Dr Gayathri E. (2020) general characters and classifications of bryophytes power point
presentation from SlideShare
at https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.slid
eshare.net/gayathripurushothaman353/general-characters-of-bryophytes
https://www.slideshare.net/gayathripurushothaman353/general-characters-of-bryophytes-
234035439-
234035439&ved=2ahUKEwiotJ6PkuyAAxUrSfEDHVXXCLQQFnoECBYQAQ&usg=AOvVaw1
X7Tlq3lkJd4eaiWSndmk5