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Biology Lab Exam II

Biology Lab Exam II - Biology Lab Exam II The Plant Kingdom...

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Biology Lab Exam II: The Plant Kingdom Plants are autotrophic, contain chlorophyll a, and have cell walls containing cellulose. All plants go through Alternation of Generations. I. Bryophytes (Mosses Liverworts, and Hornworts): The most primitive group of terrestrial plants. a. Have root-like structures called rhizoids , and may have stem and leaf-like parts. i. Rhizoids do not penetrate the soil or absorb many nutrients. b. No vascular tissues, this limits causes them to only be found in moist habitats. c. Relatively small, but are found in many habitats from the tropics to Antarctica. d. Second largest group of plants. e. Fix CO2, degrade rocks to soil, stabilize soil, and reduce erosion. f. Humans use them as a fuel, to make Scotch, and as packing materials. g. During sexual reproduction, spores produced in the capsule germinate to form independent male and female gametophytes. The archegoniophore produces archegonia each of which contains an egg; the antheridiophore produces antheridia , each of which produces many sperm. The fertilized egg is called the zygote . After fertilization, the sporophyte divides and matures with in the archegonium and produces a capsule with haploid spores (meiosis).
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