Ch 30 Flashcards
Female cones
Produces spores which develop into ovules
Ovules contain eggs
2 ovules per cone scale
Cross pollination
increases genetic variation
2 different plants
Self pollination
No genetic variation
Flowers from the same plant
Pollination
Pollen from the male cone lands on the sticky ovules
Animal pollination
Increased efficiency
Produces less pollen
More energy into the flower
Uses color, sent, nectar, to attract animals
Wind pollination
Less efficient
Must produce more pollen
Types of seed dispersal and examples
Wind- dandelion
Water- coconut
Animals- fruits
Germination
Environmental factors- WATER, oxygen, extreme cold or heat, acids of the digestive system
Dormancy
A period of dormancy allows seeds to germinate in the best possible conditions
Seed structure
Seed coat
Cotyledons (endosperm)
Embryo
Grafting
A technique in which a portion of one plant is attached to the root or shoot of another plant and grows there
Cutting
A root, stem, or leaf that is cut from a living plant and that can produce a new plant
Layering
The process of causing roots to form on stems or branches of a plant that are covered with soil
Tissue culture
The technique for growing living cells in an artificial medium
Sepals
Outer most layer
Usually green (but can be colored)
Surround and protect the flower
