Lecture_10_29_Plants6

Lecture_10_29_Plants6 - Lecture 10/29 Seed Plants II •...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 10/29 Seed Plants II • Pine Life-cycle: – additional thoughts – shared features among seed plants • Growth: – additional thoughts – mapping growth changes onto the plant tree of life • Mapping life-cycle changes onto the plant tree of life • Seed plant diversity – Angiosperms and Gymnosperms – Gymnosperms • Cycadophyta • Ginkgophyta • Coniferophyta • Gnetophyta • Additional seed plant innovations Pine Life Cycle: No antheridia!! DIPLOID (2 n ) Sporophyte generation Meiosis Meiosis Megasporangium Megasporocyte Functional megaspore Pollen grain Pollen grain Microspores Male gametophyte (germinating pollen grain) Fertilization Egg Sperm Archegonium Female gametophyte Developing embryos Zygote Section through scale Scale of strobilus Strobili Immature cone Sporophyte (about 10–100 m) Scale of cone Wing Seed Winged seed Female gametophyte Embryo Seed coat Mature cone HAPLOID ( n ) Gametophyte generation Ovule The pine life cycle illustrates common features among seed plants chloroplast DNA inversion...
View Full Document

This document was uploaded on 03/07/2010.

Page1 / 13

Lecture_10_29_Plants6 - Lecture 10/29 Seed Plants II •...

This preview shows document pages 1 - 4. Sign up to view the full document.

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