Bio 1B Lab 2 - Angiosperms and Gymnosperms

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Flashcards on Bio 1B Lab 2 - Angiosperms and Gymnosperms , created by pandabear818 on 02/11/2015.

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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
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