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46 Cards in this Set
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- Back
- 3rd side (hint)
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what are the general features of bryophytes?
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low to the ground, not true leaves/stems/roots, no vascular tissue, attached to ground by rhizoids
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how do brophytes as a group differ from other plants?
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no vascular tissue, no true stems/leaves/roots
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what are the three phyla of bryophytes?
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bryophyta, hepaticphyta, anthocerophyta
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what phyla of bryopytes is most diverse?
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bryophyta
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what bryophyte phyla is least diverse?
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anthcerohpyta
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what do liverworts, hornworts, and mosses have in common?
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dominant gametophyte stage, no true stems/roots/leaves
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how does hepaticophyta differ from bryophyta and anthocerophyta?
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simpler, flat/branched gametophyte, has air chambers for gas exchange that can't close
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how does anthocerphyta differ from brophyta and hepaticphyta?
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cell structure has with single large chloroplast resembles certain algae. hepaticophyta and bryophyta contain many small disc shaped chloroplasts. sporophyte forms a horn-shaped spike after fertilization. has stomata to regulate gas exchange
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this is the gamete plant and source of gametes
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gametophyte
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this is the spore plant, it's diploid and is the source of haploid spores
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sporophyte
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this is the female gametangia in bryophtes that can develop on the same plant as male gametangia or on different plants
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archegonium
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this is the male gametangia in bryophytes that can develop on the same plant as female gametangia or on other plants
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antheridium
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this is a flattened, lobed, leaf-like body in liverworts
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thallus
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this is a asexual spore that gives rise to new gametophytes in bryophyta and hepaticophyta
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gemmae
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this is the structure responsible for anchoring Bryophtes to substrate and absorbing water
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rhizoid
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this is leafless, single, spindle shaped stalk common to sporophytes of bryophytes
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seta
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what are the features of mosses(bryophyta)?
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no true stems/leaves/roots, held to ground by rhiziods, leaf like structures arranged spirally around axis
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where are mosses found?
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terrestrial environment in shady damp areas
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what is the dominant stage in moss life cycle?
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gametophyte
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are mosses photosynthetic?
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yes
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do mosses typically have conducting tissue in stems?
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yes. water can rise up specialized cells in center stalk of moss gametophyte
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do mosses have true roots?
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no
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do mosses need true roots?why or why not?
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don't need true roots. only lives in damp habitat. gametes travel through water new plants bud off asexually from thallus
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what do mosses have instead of roots??
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rhizoids
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what function do rhizoids serve?
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anchor moss to substrate
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what function do rhizoids serve?
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anchor moss to substrate and absorb some water
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what are antheridia and archegonia?
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the male and female reproductive structures that can be located on the same individual or different individuals
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is the sporophyte diploid or haploid?
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diploid
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are spores diploid or haploid?
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haploid
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what type of gametangia does a monocious moss have?
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antheridium(male) and archegonium(female)
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what type of gametangia does a dioecious moss have
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gametangia of one type either antheridium(male) or archegonium(female)
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what type of gametangia does a monocious moss have?
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both antheridium(male) and archegonium(female)
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what is the asexual spore of bryophytes and hepaticophytes?
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gemmae
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what structure can absorb a limited amount of water in brophytes?
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rhizoid
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what is the spindle shaped stalk common to bryophytes?
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seta
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what is the function of archegonia?
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produces eggs
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what is the function of antheridium?
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produces sperm
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what is the relationship of the sporophyte and gametophyte?
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sporophyte is parasitic on the gametophyte
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what are the features of liverworts?
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flattened/lobed leaflike structure called thallus that looks like human liver
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where are liverworts found?
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damp environments
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what are the two means of asexual reproduction for liverworts?
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gemmae can be splashed out by rain an turn into new liverwort or thallus can elongate and become a new plant
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what are the two forms of liverworts?
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leafy and thallose
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do liverworts have vascular tissue?
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no vascular tissue
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in liverworts are antheridia(female) and archegonia(male) usually found on the same individual?
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yes.
on the diploid sporophyte or haploid gametophyte? |
haploid gametophyte |
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what are the features of hornworts?
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cell structure resembles algae, forms a horn shaped spike after fertilization, resembles thalloid liverworts
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where are hornworts found?
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damp humid places
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