Plant Diversity 2 - Pollen burrows into female gametophyte...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Plant Diversity 2 What is a seed? A seed is a sporophyte embryo packed with a food and encased in protective coat Derived traits of seed plants Reduced gametophyte Evolutionary trend towards reduced gametophyye. heterospory Homosporous - most seedless plants Hetreosporous- seed plants ovules Ovule- Megasporangium, megaspore, and integument(s) pollen Microspores -> pollen grains ( contains gametophytes) Pollen transferred to ovule (via wind or animals; water independent)
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Pollen burrows into female gametophyte; discharges 2 sperm Gynosperm - means Naked seed Angiosperm- "contained seed" "flowering plants" - produces fruit Angiosperm fertilization Pollen tube delivers 2 sperm one sperm fertalizes egg one sperm fertalizes polar nuclei becomes endosperm (food) Fruit development Fertailized ovary matures into a fruit Fruit protects seed; aid dispersal Dry (e.g. chestnut) fleshy (tomato)...
View Full Document

This note was uploaded on 09/21/2011 for the course BSC 2010 taught by Professor Bowes during the Spring '08 term at University of Florida.

Page1 / 2

Plant Diversity 2 - Pollen burrows into female gametophyte...

This preview shows document pages 1 - 2. Sign up to view the full document.

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