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Week of February 28

by: Emma Shoupe
Emma Shoupe
GPA 3.7

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About this Document

We didn't take many notes, but I tried to jot down notes on the pictures we looked at. My best advice is to use these notes and research some photos of the examples.
Organismal Biology
Dr. Djibo Zanzot
Class Notes
25 ?




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This 3 page Class Notes was uploaded by Emma Shoupe on Wednesday March 2, 2016. The Class Notes belongs to BIOL 1030 at 1 MDSS-SGSLM-Langley AFB Advanced Education in General Dentistry 12 Months taught by Dr. Djibo Zanzot in Winter 2016. Since its upload, it has received 21 views. For similar materials see Organismal Biology in Biology at 1 MDSS-SGSLM-Langley AFB Advanced Education in General Dentistry 12 Months.


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Date Created: 03/02/16
ORGANISMAL BIOLOGY – DR. ZANZOT Week of February 28, 2016 March 1, 2016 Today we basically just went through images of different flowers and distinguished their parts. Here are some examples of flowers we discussed:  Grass  Milkweed  Lily  Hibiscus  Daisy  Orchid  Pansies We also discussed types of inflorescence:  Receme- peduncles  Spike Important characteristics of flowers for pollination:  Color  Shape The most important and abundant colors of flowers:  Yellow  White  Purple Some examples of animals that pollinate flowers:  Bees o Bees can see purple, yellow, and ultraviolet o Flowers have ultraviolet pigments that we can’t see  Bats  Flies o A specific flower mimics meat so it looks dead, and smells like a corpse, therefore, attracting the flies  Sphinx moth (similar to hummingbird neck) March 3, 2016 Flowering Plants  Magnolia flower  Chamilia flower  Review of the life cycle – o Sporophyte dominant o Heterospory  Starting from the anther: microsporangium containing the microsporocyte – microsporocyte goes through meiosis to form the microspore  Microspore goes through mitosis to form the microgametophyte (1 round, also the pollen grain or male gametophyte)  A tube cell is formed to make the pollen tube  A generative cell is formed to go through meiosis and produce sperm  Back at the anther: the ovary has ovules containing the megasporangium which contains the megasporocytes who goes through meiosis  A megaspore is formed (only 1 survives) and it is surrounded by integuments with a micropyle (a gap for pollen)  The megaspore is divided by meiosis to form the megagametophyte (female gametophyte)  Reduced to 7 cells with 8 nuclei  Antipodal  2 polar nuclei  2 synergids  egg  pollen goes down through style, produces 2 sperm  double fertilization occurs-  one sperm fuses with the egg (forms a zygote)  one sperm fuses with 2 polar nuclei to form a triploid cell (endosperm which feeds the embryo)  within the seed –  embryo surrounded by endosperm  seed coat Fruiting Plants  Fruit o A container for seeds o Develops from the ovary wall o Used to disperse seeds o Can be dry or fleshy  -phily = pollination o entomophily – insect pollination o anemophily – wind pollination o mellitophily – bee pollination  -chory = seed dispersal o –zoochory o endozoochory – inside o ectozoochory – outside o anemochory  The milk inside of a coconut = liquid endosperm  Strawberries aren’t true berries o Aggregate o Achene o Accessory o “seeds” are actually little fruits that contain seeds inside of them  Multiple fruits – o each composed of an individual monocarpous pistil (gynoecium) o each seed-bearing drupelet from the ovary of one pistillate flower o pineapple = multiple flowers o berry = fleshy pericarp  Tomatoes  Watermelon o Hesperidium  Lemons  Leathery o Drupe  Stony endocarp  Peach or necatarine o Pome  Apple  Ovary surrounded by fleshy hypanthium  Ovary wall = pericarp  Accessory tissue is what we eat  Dry fruit = corn, strawberries  Blackberry/Raspberry = aggregates of drupelets o Each “bubble” was a carpel o Contains seeds o Dehiscent  Naturally split open  Legume  Peanuts  Almonds (seeds inside of drupes)  Capsule (okra)  Follicle  Acorns  Achene o Sunflower seeds


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