Usman

Tag: category-94

  • Gymnosperm seeds are described as naked because they are:

    {“lesson_id”:0,”category_id”:94,”topic”:”02. Conifers (Gymnosperms)”,”choices”:[“Not enclosed in a true fruit (ovary)”,”Always microscopic”,”Never woody”,”Always eaten by fungi first”],”correct”:0,”type”:”mcq”,”explain”:”Ovules sit on cone scales, not inside a carpel.”}

  • Most familiar conifers are:

    {“lesson_id”:0,”category_id”:94,”topic”:”02. Conifers (Gymnosperms)”,”choices”:[“Mosses”,”Flowering herbs only”,”Seaweeds”,”Evergreen trees with needle leaves and cones”],”correct”:3,”type”:”mcq”,”explain”:”Pines, firs and spruces are typical conifers.”}

  • Pollen in conifers is typically produced in:

    {“lesson_id”:0,”category_id”:94,”topic”:”02. Conifers (Gymnosperms)”,”choices”:[“Male cones”,”Root nodules”,”Algal holdfasts”,”Mushrooms”],”correct”:0,”type”:”mcq”,”explain”:”Microsporangiate (pollen) cones release pollen, often wind-borne.”}

  • Conifer wood is commercially important as:

    {“lesson_id”:0,”category_id”:94,”topic”:”02. Conifers (Gymnosperms)”,”choices”:[“Only rubber latex”,”Only cotton fibre”,”Softwood timber”,”Only wheat grain”],”correct”:2,”type”:”mcq”,”explain”:”Gymnosperm xylem supplies much construction lumber and paper pulp.”}

  • Cycads and Ginkgo are:

    {“lesson_id”:0,”category_id”:94,”topic”:”02. Conifers (Gymnosperms)”,”choices”:[“Angiosperm grasses”,”Fern gametophytes”,”Other living gymnosperm lineages besides conifers”,”Lichens”],”correct”:2,”type”:”mcq”,”explain”:”Gymnosperms include conifers, cycads, Ginkgo and gnetophytes.”}

  • Many conifers are well adapted to:

    {“lesson_id”:0,”category_id”:94,”topic”:”02. Conifers (Gymnosperms)”,”choices”:[“Only deep ocean”,”Boiling hydrothermal vents”,”Cold or dry habitats (needles, thick cuticle, resin)”,”Complete darkness”],”correct”:2,”type”:”mcq”,”explain”:”Needle leaves and resins help on poor soils and in boreal climates.”}

  • The dominant generation in gymnosperms is the:

    {“lesson_id”:0,”category_id”:94,”topic”:”02. Conifers (Gymnosperms)”,”choices”:[“Tiny independent gametophyte plant”,”Algal thallus only”,”Woody sporophyte tree or shrub”,”Fungal hypha”],”correct”:2,”type”:”mcq”,”explain”:”The large plant you see is the diploid sporophyte; gametophytes live inside cones.”}

  • True or false: Conifers produce flowers.

    {“lesson_id”:0,”category_id”:94,”topic”:”02. Conifers (Gymnosperms)”,”choices”:[“True”,”False”],”correct”:1,”type”:”true_false”,”explain”:”They produce cones, not flowers; flowers are an angiosperm feature.”}