Survey of The Plant Kingdom Laboratory | BIOL 128, Study notes of Biology

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f a yO SURVEY OF THE PLANT KINGDOM Lab Introduction The plant kingdom is a very diverse group of multicellular organisms. With a few exceptions, plants are autotrophic, contain chlorophyll a, and have cell wails containing cellulose. Life cycles of all members of the plant kingdom are variations on alternation of generations, The alternation of generations can be described as the plant having two stages during its life cycle, It alternates between a multicellular, haploid (in) stage and Creattyl a multicellular, diploid (2n) stage. How is this different from our own life evcle? > Me ~ hea Wie splerd & The diploid plant is calied the sporophyte, meaning “spore-producing plant”. This generation produces a sporangium, which contains the diploid cells that will undergo meiosis to produce haploid spores. These released spores will, under the right environmental conditions, germinate and grow into the haploid, gametophyte generation. The gametophyte Is the “gamete-producing plant’, which contains reproductive structurés called antheridia, which produce the male gamete, and reproductive structures called archegonia, which produce the female gamete. If the antheridia and archegonia are on the same individual, then the gametophyte is bisexual. When a sperm fertilizes an egg, inside the archegonium, a diploid zygote is formed. After going through many mitotic events, the zygote develops into a mature diploid sporophyte. Finish filling the. diagram below by filling in the blanks ~ also label one arrow as antheridia and a different arrow as archegonia, Spar eae + e, ~ Yael Zn ZYGOTE saesefeonle FE RTELSZATIONe-onmcrcecenevneeen scree ceseceeseeenese one} ¥ : La 5 ogc t ore sper” £86 Haale * Alternation of Generations Life Cycle |