Gymnosperms Flashcards
Gymnosperms
Gymno- meaning
-sperm meaning
Naked
Seeds
Gymnosperms
Do they bear fruit?
No
Gymnosperms
Land adaptations? (3)
All from previous
Sperm dont need water to swim
Seeds
Gymnosperms
Land limitation?
Depend on wind to move sperm-producing structures to the eggs
Gymnosperms
What are the 3 parts of a seed
Sporophyte embryo
Nutritive tissues
Seed coat
Gymnosperms
What are the 4 phyla?
Pinophyta
Ginkophyta
Cycadophyta
Gnetophyta
Gymnosperms: Pinophyta
General names (3)
Cedars
Spruces
Redwoods
Gymnosperms: Pinophyta
Coniferous means?
Cone (strobila) bearing
Gymnosperms: Pinophyta
How many species?
approx 600
Gymnosperms: Pinophyta
Leaves =
Needles
Gymnosperms: Pinophyta
Fassicle =
A bunch of needles 1-8
Gymnosperms: Pinophyta
Hypodermis purpose?
Water retention
Gymnosperms: Pinophyta
Sclerenchyma purpose?
Support
Gymnosperms: Pinophyta
Stoma location and purpose?
Found in the depressions in epidermis
Water retention
Gymnosperms: Pinophyta
Vascular tissue found in __
Bundles
Gymnosperms: Pinophyta
Mesophyll is not ___
Differentiated
Gymnosperms: Pinophyta
Resin canal purpose?
Chemical defense vs fungi and insects
Gymnosperms: Pinophyta
Each megasporophyll has _ ovules
2
Gymnosperms: Pinophyta
Each ovule has a __
Megasporangium
Gymnosperms: Pinophyta
What 2 structures make up a megasporangium?
Nucellus
Megasporocyte
Gymnosperms: Pinophyta
What is a nucellus?
Tissue where embryo grows up
Like a placenta
Gymnosperms: Pinophyta
Megasporocyte creates how many megaspores?
How many live/die
4
3 die, 1 lives and becomes mature female gametophyte
Gymnosperms: Pinophyta
Human uses
3 edible parts of pinophyta?
Phloem
Vascular cambium
Seeds
Gymnosperms: Pinophyta
Human uses general (7)
Wood
Pharmaceuticals
Paper
Dyes
Ornamental
Resin
Turpintine