unit 2- biodiversity of plants Flashcards
four divisions into which the kingdom plantae are divided
-Bryophytes
-Pteridophytes
-Gymnosperms
-Angiosperms
the phenomenon where generations alternate in that one generation gives rise to the other
-Alternation of generations
what’s the generation which is sexual and produces gametes
-Gametophyte generation
which generation is asexual and produces spores
-Sporophyte Generation
what is the plant division which includes mosses, liverworts and hornworts
-Bryophytes
What is the dominant generation in the life cycle of mosses
-gametophyte generation
what is the name given to a plant where true roots, stems and leaves cannot be distinguished
thallus
What is the cap that covers the sporangium in bryophytes called
-calyptra
what is the plant division including all ferns
-Pteridophytes
what is the dominant generation in the life cycle of ferns
-sporophyte generation
what is the horizontal underground stem occurring in most ferns
-rhizomes
what is the vascular tissue present in ferns
-xylem and phloem
what are the clusters of sporangia found on the underside of fern leaves
-sori
what is the heart shaped structure that germinates from a spore of a fern and represents the gametophyte generation
-prothallus
what is the collective name given to the seed bearing plant groups, Gymnosperms and Angiosperms
-Spermatophytes
what is the plant division including conifers and cycads
-gymnosperms
what is the dominant generation in the life cycle of the pine
-sporophyte generation.
what are the structures bearing pollen sacs containing pollen grains in the pine
-male cones
what are the structures in which the pine trees ovules are carried
-female cones
what is the structure representing the male gametophyte in the pine
-germinating pollen grain
what is the structure representing the female gametophyte in the pine
-embryo sac
what is the structure into which the fertilised ovule develops
-seed
what is the term describing the seed of the pine not enclosed by an ovary
-naked
what is the seed bearing plant group with flowers
-Angiosperms
what is the structure which encloses the seed of a flowering plant and develops into a fruit
-ovary
what are the two groups into which angiosperms are divided
-mono and dicotyledons
what is the dominant generation in the life cycle of flowering plants
-sporophyte generation
what are the roots which develop from any plant organ except another root
-adventitious roots
what are the roots which develop out of other roots
-lateral roots
what is the type of venation found in the leaves of the monotyledonous plants
-parallel venation
what is the type of venation found in the leaves of the dicotyledonous plants
-net venation
what is the stamen whorl in flowering plants
-androecium
what is the pistil whorl in flowering plants
-gynoecium
what is the perianth (flower whorl) in monocotyledonous flowering plants
-perigone
what is the structure inside the ovule of a flowering plant containing the egg cell and two polar nuclei
-embryo sac
what is the party of the germinating seed of the flowering plant that gives rise to the root system
-radicle
what is the part of the germinating seed that gives rise to the stem of the new flowering plant
-plumule
