Division Anthocerophyta

Question 1

What shape is the gametophyte of Division Anthocerophyta?

Answer 1

it is rosette shaped.

Question 2

What shape is the sporophyte of Division Anthocerophyta?

Answer 2

“horn” that grows out of the rosette shape.

Question 3

What are the characteristics of hornworts?

Answer 3

small in size
have stomates
have cuticle
11 genre
Gametophyte is the thallus (1 chloroplast per cell, all form mutualism w nitrogen fixing cyanobacteria.
sporophyte is horn (green and persistent)
spores dehisce near the top of horn.

Question 4

What are the characteristics of Division Marchantiophyta (liverworts)?

Answer 4

small
thallus (plant body) that is prostate, flattened or ribbon-like branching structure.
single-celled rhizoids
lack of clear stem and leaves for thallose
deep-lobed/segmented leaves arranged in 3 ranks
most contain oil bodies
sporophytes are short-lived

Question 5

What are the characteristics of Division Bryophyta (Bryopsida??? or mosses)?

Answer 5

short, flat leaves
root-like rhizoids
peristomes
green, flat structures that look like leaves absorb nutrients and water
adaptations for dry lands like stomatas on stems of sporophyte.

Question 6

What are the two general types of liverworts (Marchantiophyta)?

Answer 6

thallose liverworts

leafy (or scaly) liverworts

Question 7

What is the dominant life cycle for Division Marchatiophyta? (liverworts)

Answer 7

the gametophyte generation

Question 8

What is the purpose of the peristome in mosses?

Answer 8

increases the spread of spores after the tip of the capsule falls off at dispersal.