Seed and Fruit Formation

Seed and Fruit Formation - different fruit types due to 3...

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Seed and Fruit Formation seed formation  - outer cell layers of ovule form seed coat postpones development until more favorable conditions protects young plant when it’s the most vulnerable keeps stored food that keep young plant alive adapted for dispersal seed coat forms >> metabolic activities stop o germination can’t start until water/oxygen reaches embryo seeds don’t germinate until appropriate conditions (heat, available nutrients, chemicals, pass through animal intestines, etc) o scarification - breaking down seed coat so that first root can emerge fruit formation  - helps angiosperm embryos survive develops from flower ovary
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Unformatted text preview: different fruit types due to 3 layers (epicarp, mesocarp, endocarp) on ovary wall o follicles - split along 1 carpel edge o legumes - split along 2 carpel edges o samaras - not split, has wing o drupes - single seed in hard pit o true berries, more than 1 seed, thin skin o hesperidia - more than 1 seed, leathery skin o aggregate fruits - derived from multiple ovaries o multiple fruits - develop from flower cluster fruit dispersal - mostly transferred by animals o fruits of maples, elms, ashes have wings >> distributed by wind o dandelions have light seeds >> wind distribution o coconuts, beach plants distributed by water...
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