Plants by Hunter
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21 terms
Terms | Definitions |
|---|---|
 non vascular seedless | no vascular tissue, xylem, phloem, true roots, stems, or leaves ex. moss, liverworts, and hornworts live close to H2O because have no xylem or phloem to transport H2O and nutrients, also need H2O so sperm can swim to egg. gametophyte generation is dominant homosporous- 1 generalized spore |
| div bryophyta | moss, small grow closs to the ground, moist habitat live close to H2O because have no xylem or phloem to transport H2O and nutrients, also need H2O so sperm can swim to egg. gametophyte generation is dominant homosporous- 1 generalized spore |
| div hepatophyta | liverworts, small, close to ground, moist habitat live close to H2O because have no xylem or phloem to transport H2O and nutrients, also need H2O so sperm can swim to egg. gametophyte generation is dominant homosporous- 1 generalized spore |
| div anthocerophyta | hornworts, small close to ground, moist habitat live close to H2O because have no xylem or phloem to transport H2O and nutrients, also need H2O so sperm can swim to egg. gametophyte generation is dominant homosporous- 1 generalized spore |
| Vascular seedless | have xylem and phloem so can grow larger 2 divisions: pteaophyta(ferns) and Lycophyta(club moss) have true roots, stems, and leaves tied to damp, moist habitat because of reproduction-sperm swim to egg homosporous-1 generalized spore sporophyte generation dominant |
| vascular seeded plants | gymnosperms and angiosperms have vt (xylem and phloem) has true roots, stems, and leaves grow large freed from damp moist habitat because sperm is transported in pollen via wind and pollenators if seeded 2 spores- heterosphorous microspore and megaspore |
| gymnosperms | Div coniferophyta Div. Ginkophyta Div. Gnetophyta Div. Cycadophyta coned plants, sporophyte generation dominant |
| angiosperms | div anthophyta- flowering plant, sporophyte gen dominant |
| gametophyte generation | sexual reproduction 1N haploid cells produce gametes(sperm and egg) by mitosis gametes can fuse "fertilization" 1N sperm and 1N egg produce a 2N zygote new zygote grows into sporophyte generation plant |
| sporophyte generation | asexual reproduction 2N diploid cells produce 1N spores by meiosis spore 1N will germinate and grow into new genotype plant 1N |
| gamatangia | site of gamete production archegonia- produces 1N eggs by mitosis female gamatangia Antheridia- male gamatangia, produce sperm 1N by mitosis |
| alternation of generations | -vascular seeded -> gynosperm -> pine tree -sporophyte generation dominant- every cell 2N -ovulate cone- big cone on tree, female, 2N sporophyte cells called sporangia -staminate- male cone, small, 2N sporophyte cells called sporangia |
| sporangia | female- megasporangia produces 1N megaspore through meisos, grow into mega gametophyte 1N male- microsporangia 2N, produces microspore 1N, through meiosis, grows into micro-gametophyte 1N then produces microgamete (sperm) which is located in a pollen grain |
| sclerenchyma | provide rigid unbending structural support, cells have 2 evenly thick cell walls filled with lignin(hard, like cement) found constructing dermal tissue and ground tissue |
| collenchyma | provide flexible bending structural support, 2 evenly thick cell walls found constructing dermal and ground tissue |
| parenchyma | produce glucose or store starch, cells have one thin cell wall found constructing ground tissue |
| tracheids and vessel elements | hollow cells that transport water |
| seive tube cells and companion cells | hollowed cells that transport glucose |
| dermal tissue | cover and protect plant constructed of dermal cells, collenchyma cells, sclerenchyma cells |
| vascular tissue | transport materials throughout plants xylem VT transport H20, made of tracheids and vessel elements phloem VT- transport glucose downward, made of seive tube cells and companion cells ground tissue-produce glucose in mesophyll(leaf), stores starch in root center, contstructed of parenchyma, collenchyma, and sclerenchyma |
| 2 types of lateral meristem | vascular cambium- produce layers of xylem and phloem, older xylem cork cambium- produce new layers of cork(bark) |
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