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Chapter 9: Flowers and Reproduction - Coggle Diagram
Chapter 9: Flowers and Reproduction
Flower Structure
sepals
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the lowermost and outermost of the four floral appendages
thickest, toughest, and waxiest of the flower parts
petals
above the sepals on the receptacle
together make up the corolla
"leaf-like" but unlike leaves they contain pigments other than chlorophyll
stamens
have 2 parts, the filament and the anther
above the petals, known collectively as the androecium
frequently referred to as the "male" part of the flower, but aren't really male
Embryo and Seed Development
the suspensor pushes the embryo deep into the endosperm.
the end of the embryo farther from the suspensor initiates 2 primordia that grow into 2 cotyledons in basal eudicots, such as beans and peanuts
in the torpedo stage, a short axis is established, consisting of radicle, epicotyl, and hypocotyl
Fruit Development
the exocarp is the outer layer-the skin or peel; the mesocarp is the middle layer, or flesh; the innermost layer is the endocarp
the entire fruit wall, whether composed of one, two, or all three layers, is the pericarp
gametophytes
microgametophytes
microspores develop into microgametophytes.
in all angiosperms, each microgametophyte is very small and simple
megagametophytes
within the ovule, the surviving megaspore develops into a megagametophyte
as with the pollen, the megagametophye obtains all of its nourishment from the parent sporophyte
