|
Creado por pandabear818
hace más de 9 años
|
|
Pregunta | Respuesta |
Changes from Ferns to Gymnosperms | 1. Lost antheridia 2. No more flagellated sperm 3. The gametophyte is no longer free-living, now is dependent on mom sporophyte. |
Retained from Fern to Gymnosperm | 1. Alternation of Genrations 2. Archegonium 3. Egg |
Ferns 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 |
In 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. |
After meiosis, megaspores are produced, only one of which survives to grow into a multicellular ____ (the other three degenerate in situ). | megagametophyte |
Angiosperm's 2 great advances: | 1. Fruit to protect the seed 2. Flowers |
Sporophyll | spore-bearing leaf |
sorus (pl. sori) | cluster of spore-producing structures (sporangia) usually located under the lower surface of fern leaves |
megasporangiate strobilus | female cone |
megasporophyll | the scales on female cones |
megasporangium | produce megaspores, give rise to female gametophytes |
megasporocyte | megaspore mother cells |
megaspore | produce female gametophytes |
megagametophyte | female gametophyte in seed plants |
microsporangiate strobilus (pl. strobili) | male cones |
microsporophyll | sporophylls that bear microsporangia |
microsporangium | sporangium that produce spores that give rise to male gametophytes |
microsporocyte | diploid cells capable of undergoing meiosis to form a tetrad of haploid microspores |
microspores | develop into male gametophytes |
pollen | male gametophyte of seed plants |
microgametophyte | male gametophyte (in seed plants it is the pollen grain ) |
pollen tube | sperm travels down this pollen tube into the ovule |
cotyledons | seed leaves - important storage organs. As seed matures, cotyledons absorb nutrients from the endosperm |
seed | a seed consists of: embryo its food supply |
integument | a layer of tissue that surrounds and protects the megasporangium and megaspore |
seed coat | hard protective layer that forms the integuments of the ovule |
monocotyledons | monocots - 1 of 2 main angiosperms, 1 cotyledon forms on the embryo |
eudicotyledon | dicots, 2 cotyledons form |
flower | the basic structure of sexual reproduction in angiosperms |
inflorescence | in angiosperms, a cluster of flowers on a branch or a system of branches |
sepal | help protect the flower bud before it opens |
calyx | collectively, sepals are known as the calyx |
petal | the colorful part of the flower |
corolla | petals as a unit |
stamen | male reproductive parts, contains pollen |
anther | pollen is contained on the tip of the stamen, called the anther |
filament | the stalk that holds the anther up |
carpel | female reproductive parts |
ovary | holds the ovules |
ovule | where the female gametophyte developes and produces eggs |
stigma | sticky and receives pollen |
style | stem-like thing on top of ovary |
double fertilization | 1 sperm fuses with eg, 1 sperm fuses with 2 polar nuclei to form a 3N cell |
endosperm | plants way of storing food in the seed |
fruit | protect seed and help with seed dispersal an enlarged ovary |
¿Quieres crear tus propias Fichas gratiscon GoConqr? Más información.