Exam 3 Notes - BIOL 1202 Exam 3 Notes...

Info icon This preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
BIOL 1202 Exam 3 Notes Chapter 30: Plant Diversity II: The Evolution of Seed Plants Concept 30.1: Seeds and pollen grains are key adaptations for life on land  Characteristic common to all seed plants 1. Seeds 2. Reduced Gametophytes 3. Heterospory 4. Ovules 5. Pollen Gametophyte/sporophyte relationships o Gametophytes of seed plants develop within the walls of spores retained within  tissues of the parent sporophyte  o No longer dependent on water for fertilization
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Oveules and Production of Eggs o An ovule consists of megasporangium,  megaspore, and protective integuments Pollen and production of sperms o Micorspores develop into pollen grains o Pollen can be dispersed by air or animals, eliminates the need for water in  fertilization
Image of page 2
3 If a pollen grain germinates,.. o It gives rise to a pollen  o 30.3b  A Seed o Develops from the whole ovule o Includes sporophyte embryo, food supply,  protective coat  o Pine seed pic o Figure 30.3c Concept 30.2: Gymnosperms bear “naked” seeds,  typically on cones Gymnosperms include… o Phylum cycadophyta Sago palms o Phylum Ginkophyta
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
4 o Phylum Gnetophyta  o Phylum Coniferophyta Pines, Firs, Junipers, Sequoias A closer look at the Life Cycle of a Gymnosperm o Key features of the gymnosperm life cycle include Dominance of the sporophyte generation The role of pollen in transferring sperm to ovules
Image of page 4
5 No water required The development of seeds from fertilized ovules  o Pine Life Cycle Figure 30.6
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
6 Concept 30.3: The reproductive adaptations of angiosperms include flowers and fruits Angiosperms, a.k.a., flowering plants “covered seeds”
Image of page 6
7 Derived traits are the reproductive structures called flowers and fruits The most widespread and diverse of all plants 250,000 species 90% of all extant plant  species Angiosperm Diversity Amborella Found in the South  Pacific Water Lily Star Anise Southern Magnolia Figure 30.12 Figure 30.13 Figure 30.13
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
8 Monocots Grasses, palm trees, lilies, wheat, barley, several grains One seed leaf Eudicots The majority of angiosperms Two seed leaves Trees, bushes, zucchini
Image of page 8
9 Flowers Specialized for asexual reproduction Specialized shoot with modified leaves Sepals – enclose the flower protect flower before it blooms Petals – brightly colored, attract pollinators smaller petals for flowers that distribute pollen through the  wind Stamens – produce pollen Contains the filament Carpels – produce ovules Ovules produce the megasporangium Fruits A mature ovary Ovary matures after fertilization of ovules Can be carried by wind, water, or animals, enhancing dispersal Figure 30.8 Figure30.9 The Angiosperm Life Cycle
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern