Flashcards
Bio 1B Lab 2 - Angiosperms and Gymnosperms
Flashcards do conjunto (45)
- 1Changes from Ferns to Gymnosperms1. Lost antheridia
2. No more flagellated sperm
3. The gametophyte is no longer free-living, now is dependent on mom sporophyte. - 2Retained from Fern to Gymnosperm1. Alternation of Genrations
2. Archegonium
3. Egg - 3Ferns have retained from bryophytes:1. Alt. of Generations
2. Flagellated gametes - only time male gametes are released is if there is water
3. Archegonium, antheridium
4. Sporophyte lives off of gametophyte - 4In gymnosperms: 1. Eggs are produced by a large cone. The female gamete is called ____. It is produced inside a ____. 2. Pollen is produced by a small cone. The male gamete is called a ___. It is produced in a ____.1. Megaspore, megasporangium.
2. Microspore (pollen), microsporangium. - 5After meiosis, megaspores are produced, only one of which survives to grow into a multicellular ____ (the other three degenerate in situ).megagametophyte
- 6Angiosperm's 2 great advances:1. Fruit to protect the seed
2. Flowers - 7Sporophyllspore-bearing leaf
- 8sorus (pl. sori)cluster of spore-producing structures (sporangia) usually located under the lower surface of fern leaves
- 9megasporangiate strobilusfemale cone
- 10megasporophyllthe scales on female cones
- 11megasporangiumproduce megaspores, give rise to female gametophytes
- 12megasporocytemegaspore mother cells
- 13megasporeproduce female gametophytes
- 14megagametophytefemale gametophyte in seed plants
- 15microsporangiate strobilus (pl. strobili)male cones
- 16microsporophyllsporophylls that bear microsporangia
- 17microsporangiumsporangium that produce spores that give rise to male gametophytes
- 18microsporocytediploid cells capable of undergoing meiosis to form a tetrad of haploid microspores
- 19microsporesdevelop into male gametophytes
- 20pollenmale gametophyte of seed plants
- 21microgametophytemale gametophyte (in seed plants it is the pollen grain )
- 22pollen tubesperm travels down this pollen tube into the ovule
- 23cotyledonsseed leaves - important storage organs. As seed matures, cotyledons absorb nutrients from the endosperm
- 24seeda seed consists of:
embryo
its food supply - 25integumenta layer of tissue that surrounds and protects the megasporangium and megaspore
- 26seed coathard protective layer that forms the integuments of the ovule
- 27monocotyledonsmonocots - 1 of 2 main angiosperms, 1 cotyledon forms on the embryo
- 28eudicotyledondicots, 2 cotyledons form
- 29flowerthe basic structure of sexual reproduction in angiosperms
- 30inflorescencein angiosperms, a cluster of flowers on a branch or a system of branches
- 31sepalhelp protect the flower bud before it opens
- 32calyxcollectively, sepals are known as the calyx
- 33petalthe colorful part of the flower
- 34corollapetals as a unit
- 35stamenmale reproductive parts, contains pollen
- 36antherpollen is contained on the tip of the stamen, called the anther
- 37filamentthe stalk that holds the anther up
- 38carpelfemale reproductive parts
- 39ovaryholds the ovules
- 40ovulewhere the female gametophyte developes and produces eggs
- 41stigmasticky and receives pollen
- 42stylestem-like thing on top of ovary
- 43double fertilization1 sperm fuses with eg, 1 sperm fuses with 2 polar nuclei to form a 3N cell
- 44endospermplants way of storing food in the seed
- 45fruitprotect seed and help with seed dispersal
an enlarged ovary
Informações
- Descrição
- FlashCards sobre Bio 1B Lab 2 - Angiosperms and Gymnosperms , criado por pandabear818 em 11-02-2015.
- Criado por
- pandabear818 · fev 2015
- Atualizado
- 19 fev 2016
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- 40
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