Lecture 21- Bryophytes & Linches

Question 1

what do lichens consist of? (3)

Answer 1

microorganisms (algae & bacteria)
fungi
yeast

Question 2

what is unique about fungi?

Answer 2

can get nutrition from anything, even rocks

Question 3

what is the photosynthetic component in linchens?

Answer 3

green algae (they provide a lot of nitrogen to the fungus)

Question 4

lichens have soredia, what does it do?

Answer 4

helps to reproduce asexually

Question 5

what are bryophytes known as?

Answer 5

non vascular plants

Question 6

what are the 6 main traits of bryophytes?

Answer 6

dominant gametophytic phase is (n)
no xylem or phloem
no roots
no leaves
no cuticle
sporophyte is dependent on female gametophyte for nutrition

Question 7

what do bryophytes consist of?

Answer 7

mosses
hornworts
liverworts

Question 8

what is unique about mosses?

Answer 8

can live in extreme environments
can help retain nitrogen in the soil

Question 9

peat moss creates peat, what does peat do?

Answer 9

can be used to preserve bodies
can be used as a source of fuel
stores carbon

Question 10

how does the moss life cycle work?

Answer 10

meiosis occurs in sporangium
capsule explodes and disperses the tiny spores (n)
spores develop into male and female gametophytes
male gametophytes go through the antheridia to produce flagellated sperm
female gametophyte produces a rhizoid
female gametophytes go through the archegonia to produce female gametes
fertilization (sperm swim through water to reach and fertilize the egg)
zygote produced (2n)
mature sporophytes (2n) are produced which are the capsule

Question 11

what environment are hornworts found in?

Answer 11

damp and humid environments

Question 12

what are unique about liverworts?

Answer 12

smallest sporophytes
male and female gametangia are on separate plants

Question 13

what is the difference between liverworts and other bryophytes?

Answer 13

liverworts have no stomata, other bryophytes have stomata for gas exchange