Organismal Biology Vocabulary List 5
Organismal Biology Vocabulary List 5 BIOL 1030 - 002
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This 2 page Class Notes was uploaded by Brooke Polinsky on Saturday February 27, 2016. The Class Notes belongs to BIOL 1030 - 002 at Auburn University taught by Debbie R. Folkerts in Summer 2015. Since its upload, it has received 24 views. For similar materials see Organismal Biology in Biology at Auburn University.
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Date Created: 02/27/16
VOCABULARY LIST 5 1. Coniferophyta= cone bearing trees; largest phylum in gymnosperms 2. Ginkgophyta= Ginkgo Bilboa is the only surviving species of this phylum; have ﬂagellated sperm; deciduous fan like leaves that turn gold in autumn; pollution resistant; female trees produce a rancid smell 3. Cycadophyta= species in this phylum have large cones and palm like leaves; unlike most seed plants cycads have ﬂagellated sperm; thrived during the Mesozoic era, known as the age of the cycads or age of the dinosaurs; today most of the species in this phylum are endangered 4. Gnetophyta= includes plants in three genera: Gnetum, Ephedra, and Welwitschia; some are tropical and other live in deserts; grouped together based on molecular data 5. ovulate (seed, megasporangiate) cones= a more proper name for a female cone in the pine life cycle; also called a megasporangiate strobilus; contains megasprophylls 6. pollen (microsporangiate) cones= also called male cones or microsporangiate strobilus and they contain the microsporophylls 7. microsporophyll= a modiﬁed leaf that bears sporangia and hence is specialized for reproduction. 8. microsporangia= a male multicellular organ in fungi and plants in which meiosis occurs and haploid cells develop. 9. pollen sac= is apart of the stamen in an angiosperm that is inside the microsporangium of the stamen 10. microspores= a spore that forms heterosporous plant species that develops into a male gametophyte 11. pollen grain= in seed plants, a structure consisting of the male gametophyte enclosed within a pollen wall 12. prothallial cells= 2 cells within pollen grain that allows the grain to be able to ﬂoat in the wind. 13. tube cell= one of the four cells of the pollen grain that elongate into a pollen tube to aid with fertilization 14. generative cell= generates sperm for the pollen grain 15. air bladders= assists the pollen grain to be able to be carried by the wind to the megagametophyte in the ovule 16. pollination= the transfer of pollen to the part of the seed plant containing the ovules, a process required for fertilization 17. ovule= a structure that develops within the ovary of a seed plant and contains the female gametophyte 18. ovuliferous scale complex= the seed scales 19. integument= layer of the sporophyte tissue that contributes to the structure of an ovule of a seed plant. 20. micropyle= a pore in the integuments of the ovule 21. nucellus= it is the central portion of the ovule in which the embryo sac develops in angiosperms 22. megasporangium= are contained inside the ovule and trsutures in which the megaspores are formed 23. megaspore mother cell= or megasporocyte, is a diploid cell in plants in which meiosis will occur, resulting in the production of four megaspores 24. pollen tube= a tube that forms after germination of the pollen grain and that functions in the delivery of sperm to the ovule. 25. embryo= the female gametophyte of angiosperms, formed from the growth and division of the megaspore into a multicellular structure that typically has eight haploid nuclei 26. seed coat= a tough outer covering of a seed, formed from the outer coat of an ovule. In a ﬂowering plant, the seed coat encloses and protects the embryo and endosperm 27. female gametophyte= contains the egg cell and the central cell that becomes fertilized into an embryo 28. cotyledon= a seed leaf of an angiosperm embryo. Some species have one cotyledon and others have two 29. epicotyl= In an angiosperm embryo, the embryonic axis above the point of attachment of the cotyledons and below is the ﬁrst pair miniature leaves 30. hypocotyl= in an angiosperm embryo, the embryonic axis below the point of attachment of the cotyledons and above the radicle 31. root cap= a cone of cells at the tip of the plant root that protects the apical meristem 32. giant Sequoia= record size for any organism 320 ft. tall and 57 ft. in diameter (4,000); General Sherman is the name of the oldest giant sequoia and it is also monoecious 33. bristle cone pine= record age for any organisms is 4,600 years old 34. long leaf pine= PINUS PALUSTRIS! ORGANISM OF THE DAY!; only tree that is dominant tree in forest, has an open canopy, home of the red crackled wood pecker and highly prized for its lumber 35. Paciﬁc yew= taxol an eﬀective drug against cancer; also home to the spotted owl who is an endangered species 36. Ginkgo biloba= only surviving species in the phylum Ginkgophyta and its common name is the maidenhair tree 37. Gnetum= a genus in the phylum gnetophyta; all tropical trees in this genus 38. Welwitschia= grows in the desert; can live for thousands of year; its starlike leaves are among the largest leaves known 39. Ephedra= desert shrubs called "mormon tea" produce the compound ephedrine which is used medicinally as a decongestant
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