Lecture 15: Bryophytes and Lichens Flashcards
lichens form symbiotic relationships with which organisms?
fungi and yeast
___ are the first inhabitants of new soil/rock surfaces
lichens
what makes up the fungal hyphae?
millions of photosynthetic cells
what is the photosynthetic component in fungal hyphae?
green algae or cyanobacteria
what is the fungal component in fungal hyphae?
ascomycete
how do lichens reproduce? is it sexual or asexual?
asexual, use soredia (have fungal hyphae and algal cells that attach to new surfaces when released)
____ are the non-vascular clade of plants
bryophytes
which plant groups make up bryophytes?
liverworts, mosses, hornworts
_____ are not very tall, close to the ground and near water sources/in moist environments because they can’t transport water using vascular systems
bryophytes
what is peat?
partially decayed organic matter created and deposited by peat moss
what is the main function of peat?
nitrogen deposition and carbon cycling
___ is a multicellular diploid form of the plant body
sporophyte
___ is the structure that produces haploid gametes in plants
gametophyte
__ is the structure where meiosis occurs and haploid spores develop
sporangium
__ is the structure where gametes develop in male plants
anteridia
__ is the structure where gametes develop in female plants
archegonia
what are the six main traits of bryophytes?
dominant haploid gametophyte, no xylem/phloem, no roots, no leaves, no cuticle, sporophyte is dependant on female gametophyte for nutrition
what are bryophytes sporophytes made up of?
foot, seta, sporangium
hornworts and mosses have ___ for gas exchange, liverworts do not
stomata
what does the foot of a bryophyte do?
receives nutrience from female gametophyte
what is the seta of a bryophyte?
the elongated stalk
what does the sporangium of a bryophyte do?
site of meiosis
