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BIS_2C_Plant_Biology_StudyQ_S11_KEY-FIX

BIS_2C_Plant_Biology_StudyQ_S11_KEY-FIX - Keen Sinha S11...

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Keen & Sinha S11 -1- BIS 2C Study Questions 3: Plants--KEY 1 . Define each of the following statements as true or false: All photosynthetic bacteria form a clade. F (review bacterial & archaeal metabolisms) All photosynthetic eukaryotes form a clade. F (review endosymbiosis) The red algae belong to clade Plantae. T (Fig. 28.1 in Life 9 th ed; this clade is more inclusive then the old “Kingdom Plantae”) The chloroplast is a homologous feature for Clade Plantae. T (Fig. 28.1 in Life 9 th ed) Presence of a chloroplast is a synapomorphy for Clade Plantae. T (Fig. 28.1 in Life 9 th ed) 2. Is a typical fern that you buy for your yard a sporophyte or a gametophyte? Sporophyte (look at fern life cycle) Where would you find the other half of the life cycle? On the moist forest floor (or similar habitat) as a small gametophyte (check out living fern gametophytes from lab in CLC) 3. Is a plant that makes both eggs and sperm homosporous, heterosporous, or can’t you tell? (Hint: Lab 4, group #3) Can’t tell (what is described is heterogamy ) Do megagametophytes and microgametophytes both occur in a homosporous plant? NO ( homo = same; sporous = spore; if the spores are the same size so are the gametophytes--look at moss and fern life cycles) 4 . Define each of the following statements as true or false: Plants fix nitrogen from the air in their own cells. F (review Bacteria & Archaea symbioses from lab) Beans, lupines, and some other plants use bacterial symbionts ( Rhizobium ) to fix N-containing compounds from soil. F (see below) Beans, lupines, and some other plants use bacterial symbionts ( Rhizobium ) to fix nitrogen gas from air. T (the N gas in the atmosphere diffuses into the soil and to the roots) Some plants, such as roses, use fungal symbionts (mycorrhizae) to fix nitrogen from air. F (mycorrhizas do not fix nutrients, they only absorb them) Some plants, such as roses, use fungal symbionts (mycorrhizae) to fix nitrogen from soil. F (see above) Hornworts have internal cavities with nitrogen-fixing cyanobacteria. T (see “Cyanobacterial-plant symbioses” now added to “supplemental readings” subfolder “plant diversity” in Resources)
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Keen & Sinha S11 -2- 5 . There are internal cavities in the stems of horsetails ( Equisetum ) inhabiting swampy area.
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