'Protective seed coat' diaporamas de présentation

Chapter 24 - Evolution and Diversity of Plants

1.04k views • 50 slides

CHAPTER 38

CHAPTER 38. ANGIOSPERM REPRODUCTION AND BIOTECHNOLOGY. Male wasps transfer pollen to an Mediterranean orchid. I. Concept 38.1: Unique Features of the Angiosperm Life Cycle. A. Overview Diploid (2 n ) sporophytes produce spores by meiosis; these grow into haploid ( n ) gametophytes

631 views • 42 slides

Seedless Reproduction

Seedless Reproduction. The Importance of Spores Ferns and mosses do not produce seeds. The sporophyte stage of these plants produce haploid spores in structures called spore cases. When the spore case breaks open, the spores are released and spread by wind or water.

531 views • 38 slides

Chapter 30

Chapter 30. Plant Diversity II: The Evolution of Seed Plants. Figure 30.1. Overview: Feeding the World Seeds changed the course of plant evolution Enabling their bearers to become the dominant producers in most terrestrial ecosystems.

487 views • 37 slides

805 views • 36 slides

Plant Evolution

Plant Evolution. http://www.earthtimes.org/climate/can-plants-evolve-fast-cope-climate-change/269/.

926 views • 35 slides

Diversity of Eukaryotes

Diversity of Eukaryotes. CHAPTERS 3 and 4. The Mind-Boggling Diversity of Life. The Eukarya domain contains four kingdoms Protista Plantae Fungi Animalia Eukaryotes evolved sometime after prokaryotes populated the Earth. The Dawn of Eukarya. Key evolutionary features of eukaryotes:

650 views • 31 slides

Plant Reproduction

Plant Reproduction. Chapter 31. Plants and Pollinators. Pollen had evolved by 390 million years ago Sperm packed inside a nutritious package Transferred first by wind currents Later transferred by insects Plants that attracted insect pollinators with flowers had a reproductive advantage.

349 views • 24 slides

Plant Classification

Plant Classification.

574 views • 23 slides

Plants and Seeds

Plants and Seeds. Plants and Seeds. Table of Content. Terms What is a seed? What will you see in a seed ? Monocots &Dicots Seed parts Life cycle of plant Germination Steps Pictures of seeds and their parts Activities & Discussion Activity websites . Plants and Seeds. Terms.

1.04k views • 21 slides

Seeds

508 views • 19 slides

Plant General Characteristics

773 views • 17 slides

Gymnosperms

Gymnosperms. Kristin Stuck Maggie Quamme. Unique Characteristics. Adapted for water conservation. Gametophytes reduced in size, often staying within the parent sporophyte plant. Swimming sperm replaced by dispersal of the whole male gametophyte (pollen) by wind or insects.

375 views • 14 slides

Reproduction in Angiosperms

443 views • 13 slides

Interactions Among Plant Systems

646 views • 12 slides

Pre-Assessment

Pre-Assessment. http:// commons.wikimedia.org /wiki/ File:Plant.svg. Plant Reproduction Pre-Assessment. #1 In the angiosperm, the ovules become ________ at maturity. A) the megasporangium B) the female gametophyte C) the male gametophyte D) the winged seeds

229 views • 7 slides