Topic 14

Answer 1

Earliest lineages of nonvascular plants with three paraphyletic groups including liverworts, mosses, and hornworts

Question 2

Characteristics of Bryophytes

Answer 2

Lack vascular tissue and lignin
Small size
Lack of structure support tissues for growth
No true roots
No leaves
Unbranched

Question 3

Life Cycle of Byrophytes

Answer 3

Live most of it’s life as a haploid gametophyte and only exists for a short time as smaller diploid sporophytes that are dependent on the gametophyte

Question 4

Moss Life Cycle

Answer 4

1. Spore generated into gametohyte (1n) composed of protonema and gametophore
2. Haploid protonemata produce “buds” dividing by mitosis and growing to gametophores
3. Sperm produced by Antheridia swim through a film of moisture to egg
4. Archegonia produce egg for fertilization
5. Fertilization occurs with water

Question 5

Antheridia

Answer 5

Moss structure that produce and release flagellated sperm

Question 6

Archegonia

Answer 6

moss structures that produce egg and are the site of fertilization