chapter27 and 28 col of land, seedless and seeded

chapter27 and 28 col of land, seedless and seeded - produce...

Info iconThis preview shows pages 1–27. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 27
Background image of page 1

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

View Full DocumentRight Arrow Icon
seedless seeded
Background image of page 2
Most plants have evolved multicellular gametangia; gametes protected by sterile cells
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

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

View Full DocumentRight Arrow Icon
Still on the gametophyte
Background image of page 6
Background image of page 7

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

View Full DocumentRight Arrow Icon
Background image of page 8
Seedless non-vascular (bryophytes): Seedless vascular (club mosses, ferns):
Background image of page 9

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

View Full DocumentRight Arrow Icon
Background image of page 10
Smooth stem Vascular tissue enation Vascular supply enters enation microphyll
Background image of page 11

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

View Full DocumentRight Arrow Icon
Christmas fern Mosquito fern
Background image of page 12
Thicker main stem Dichotomous end branches Equal branches Vascular tissue Thinner side branch Dichotomously branching stems unequal branching branching in same plane) Webbing of side branch system Megaphyll (many veins) Megaphyll evolution:
Background image of page 13

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

View Full DocumentRight Arrow Icon
Background image of page 14
Calamites (ancient) had underground rhizome where roots and aerial shoots originated
Background image of page 15

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

View Full DocumentRight Arrow Icon
(n) generation (2n) generation
Background image of page 16
Seedless (ex some club mosses (Selaginella) and ferns) Seeded (all) Homosporous Heterosporous Each sporophyte contains male and female sporangia, with special cells (sporocytes) that
Background image of page 17

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

View Full DocumentRight Arrow Icon
Background image of page 18
Background image of page 19

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

View Full DocumentRight Arrow Icon
Background image of page 20
Background image of page 21

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

View Full DocumentRight Arrow Icon
Background image of page 22
Background image of page 23

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

View Full DocumentRight Arrow Icon
Background image of page 24
Background image of page 25

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

View Full DocumentRight Arrow Icon
Background image of page 26
Background image of page 27
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: produce many spores via meiosis Each sporophyte contains special cells all of which produce many of one type of spore Chapter 28 Gymnosperms (10%) Angiosperms (90%) Ovule-Gymno-Angio-fr.svg Mature sporophyte plant ( 2 megasporangia 2 microsporangia 4 megaspores Main megaspore cell 3 degenerate Generative cell Tube cell 2 disintegrate In winged pollen grain; dispersed by wind meiosis DOMINANT MONOECIOUS Pollen tube grows into egg cell Sperm nuclei discharged Zygote (2n) Embryo in seed Dispersal by wind germination (2n); mature sporophyte Gymnosperms Sporophyte (2n) Gametophyte (n) Each female cone scale Each pollen cone scale Mature to become pollen grains containing Ginkgo Fig 28-7 (Phylum Ginkgophyta) Angiosperms (phylum Anthophyta) Present as nutritive tissue in mature plant Endosperm absent Gymnosperms have many cotyledons...
View Full Document

This note was uploaded on 11/09/2011 for the course BIO 101 taught by Professor Martin during the Fall '08 term at Rutgers.

Page1 / 27

chapter27 and 28 col of land, seedless and seeded - produce...

This preview shows document pages 1 - 27. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online