1. Plant Diversity and Life Cycles
Biology 2
Chapter 29

2. Lycophyta- Nonvascular Plants
Plants which lack xylem and phloem, the vascular tissues which carry water and sugars to all parts of the plant.
Lack true leaves, roots and stems
Hornworts, liverworts and
mosses

3. Hornworts

5. Liverworts

7. Mosses

8. Life Cycle of Mosses
The dominant form of a moss is a clump of leafy green gametophytes which produces the sperm and the egg
Have alternation of generations
The alternate form is called the sporophyte and produces the spores

11. Antheridium
The male reproductive structures that produce hundreds of flagellated sperm by mitosis

12. Archegonium
The female reproductive structure that produces a single egg by mitosis

13. Fertilization
When sperm unites with the egg and begins dividing to form the zygote
haploid
haploid
diploid

14. Sporophyte
Grows from the tip of a gametophyte and remains attached to it
Forms the spores by meiosis which are released and grow to produce the gametophyte

15. Seedless Vascular Plants
Plants which reproduce by spores and lack vascular tissue
Ferns, horsetails and whisk ferns

16. Pterophyta
Ferns

17. Life Cycle of a Fern Has alternation of generations
The sporophyte is the dominant form
The gametophyte is tiny and forms the antheridia and archegonia

19. Sori
Located on the underside of a fern frond and contain the sporangia where the spores are formed

28. Sphenophyta
Horsetails, Equisetum Equisetum

29. Psilophyta
Whisk ferns