TAMU BIO 112 ch 25- Seedless plants Comprehensive Practice Exam 100% Verified (covers all sections)

- CO2 higher -light intensity higher - more minerals - no herbivores - no competition - correct answer what are some advantages of land plants - alternation of generations - apical meristem tissue in roots and shoots waxy cuticle to resist desiccation - cell walls with lignin to support structures off the ground - correct answer what are some adaptations plants developed to live on land the zygote is unicellular instead of multicellular - correct answer why does the charophyte life cycle not display alternation of generations? walled haploid spores - correct answer -dispersal through air -made within multicellular sporangium multicellular gametangia - correct answer protect sperm within antheridium archegonium - correct answer structure that protects the egg; fertilization occurs here apical meristems - correct answer -continuously dividing cells -roots and shoots grow toward resources waxy cuticle - correct answer -stops desiccation -pores needed to allow CO2 and O2 exchange stomata - correct answer where does the exchange of CO2 and O2 occur secondary metabolites - correct answer chemicals that deter, repel, or poison competitors, herbivores, and parasites mycorrhizae - correct answer mutualism between fungi and plant roots; helps water and mineral absorption 1. hepaticophyta (liverworts) 2. anthocerotophyta (hornworts) 3. bryophyta (mosses) - correct answer list the three phyla of Bryophytes - haploid gametophyte dominant - diploid sporophyte depends on gametophyte for food and water - non-woody, small, ground-covering plants that require water for reproduction - correct answer what are some characteristics of bryophytes liverworts - correct answer phyla of bryophytes; most have elevated gametophytes that resemble miniature trees; have reduced or very small sporophytes hornworts - correct answer phyla of bryophytes; good colonizers of moist soils; symbiotic relationship wit nitrogen-fixing cyanobacteria; gametophyte dominant mosses - correct answer phyla of bryophytes; most numerous and diverse phylum; live in extreme environments; sporophyte grows up from female gametophyte to gain elevation for spore dispersal - major primary producers in cold or high altitude regions - pioneer species in poor soils - sphagnum "peat moos" bogs: important wetlands, also harvested for fuel - correct answer ecological importance of mosses - branched sporophytes that are independent of gametophyte for nutrition - diploid sporophyte dominant - have vascular system (phloem and xylem) - evolution of true roots and leaves - correct answer characteristics of seedless vascular plants sporophylls - correct answer leaves modified to bear sporangia whisk ferns (psilotum) - correct answer -dichotomous branching -no true leaves or roots -homosporous -photosynthesis occurs in stem horsetails (equisetum) - correct answer -joined stems with tiny leaves -strobili -homosporous -photosynthesis occurs in stems ferns - correct answer -most widespread and diverse monilophytes -homosporous -large megaphylls -sori underside of sporophylls -mostly in understory or as epiphytes epiphyte - correct answer grows on the surface of a plant they have rhizoids for attachment - correct answer what do Bryophytes have instead of true roots thalloid liverwort - correct answer gametophytes that are flattened leafy liverwort - correct answer has leaf-like appendages true - correct answer true or false, liverworts lack cuticle adaptation of mosses - correct answer phenolic compounds in cell wall of mosses absorbs UV allowing them to live in extreme environments peats - correct answer parts of partially decayed organic material formed by gradual decomposition of plants under certain conditions true - correct answer true or false, microphyll is only present in lycophytes microphyll leaves - correct answer unbranched vascular tissue megaphyll leaves - correct answer branched vascular tissue strobilus - correct answer cone like structure fronds - correct answer large megaphylls false - correct answer true or false, seedless plants aren't dependent on water for reproduction