Plant Diversity.pdf

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Phylum Coniferophyta - the conifers Includes pine, spruce, fir, hemlock and cypress Redwood is tallest plant, bristlecone pine is oldest Found in cooler, temperate, drier regions of world Great economic value, timber, paper, resins, turpentine One hundred species native to northern hemisphere Most have needle-like leaves, in clusters of two to five needles - tough needles retard loss of water have resins that deter insect and fungal attack Wood consists primarily of tracheids Lack vessels or fibers absence of fibers causes wood to be "soft" Thick bark is an adaptation to survive fires and subzero temperatures
Conifer reproduction: heterosporous Pollen grains produced in male cones, cluster at tips of lower branches Male cones composed of small, papery scales arranged in spiral or whorl Pair of microsporangia form within each scale Microspore mother cells undergo meiosis, form four microspores Microspores develop into 4-celled pollen grains with pair of air sacs
Page 1: Kingdom Plantae Characteristics chl
Page 6 and 7: Characteristics of nonvascular plan
Page 8: Terms: Sporophyte - a multicellular
Page 11 and 12: Vascular Plants - have vessels (tub
Page 13 and 14: Phylum Pterophyta - the ferns, whis
Page 15 and 16: Whisk Ferns remnants of earliest va
Page 17 and 18: Phylum Lycophyta: Club Mosses World
Page 19: Gymnosperms comprise 4 phyla Conife
Page 23 and 24: Conifer reproduction: Female cones
Page 26 and 27: Phylum Cycadophyta: Cycads Slow gro
Page 28 and 29: Phylum Ginkgophyta: Ginkgo Fossils
Page 30 and 31: Flower structure: modified stems be
Page 32 and 33: Angiosperm life cycle Male gametoph
Page 34: Double fertilization: One sperm nuc
Page 37: Classes of Angiosperms: Class Monoc

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