Outline_Lecture_15 - b Nucellus becomes nucleus c...

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

View Full Document Right Arrow Icon
Outline Lecture 15 Seed plants - Gymnosperms 1. The seed is an important advancement- made it easier for reproduction b/c of dispersal 2. Gymnosperms have naked seeds- seed isn’t enclosed completely 3. Gymnosperm life cycle- notes 4. There are four groups of gymnosperms Cycads- most ancient lineage of gymnosperms (age of dinos), huge female cones and mobile sperm, largest sperm in any organism Gingkos- single living species, dioecious, no remaining wild ones Gnetophytes- Gnetum: shares same type of trachea w/ angiosperms (analagous) / Welwitschia: grows in African deserts, longest leaves of any plant/ Ephedra: used to mke ephedrin with it Connifers- most common, lots and lots Seed plants - Angiosperms 1. Why are angiosperms so successful? Vessel cells, rapid maturation, pollinators, fruits Key terms/concepts: 1. Parts of a seed a. Megaspore- female gamete
Background image of page 1

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

View Full Document Right 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: b. Nucellus- becomes nucleus c. Integument- hard seed cover d. Micropyle- entering in which pollen tube grows from which leads to fertilization 2. Three ways seeds are adaptive- 1. Allow for dispersal 2. Allow for dormancy 3. Reduction of gametophytic phase 3. Homospory vs heterospory- ferns are homo/ seed plants are hetero 14. Flower parts (sepals- leaves, petals, anthers-where spores are, filaments- support anthers, stamens (filaments+anthers), ovary, ovules, style, stigma, carpel) 15. Types of fruit- apple- single carpel w/ interior seeds/ tomato- fused carpels, legume- bean is ovary/ peach- seed inside hard pit 16. How is the angiosperm life cycle different than the gymnosperm life cycle? Shorter gametophyte stage Organisms to know: Ginkgo biloba- male form of ginkgo plant Welwitschia- gnetophyte Ephedra (Mormon tea)...
View Full Document

{[ snackBarMessage ]}

Page1 / 2

Outline_Lecture_15 - b Nucellus becomes nucleus c...

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