Plant Reproduction

Life Cycle of Gymnosperms Occurs in cones Pollen Cones – male cone produces pollen Seed Cones – female cone has 2 ovules; larger Pollination – wind Fertilization and Development Produce a diploid zygote  embryo  seed

Gymnosperm Life Cycle

Structure of Flowers Reproductive Organs Specialized Leaves Sepals Petals Stamens Carpels

Structure of Flowers Sepals – encloses & protects the bud before flower opens; green Petals – brightly colored; attract insects

Structure of Flowers Stamens – male part Anther – produces pollen Filament – stalk supporting anther Carpels – inner most part; pistils Ovary – contains female gametes Style – stalk connecting ovary and stigma Stigma –where pollen lands

Life Cycle of Angiosperm Occurs in flowers Specialized leaves: sepals, petals, stamens, carpels Pollination – by animals After fertilization, the ovary walls thicken to form a fruit to enclose developing seed

Life Cycle of Angiosperm

Seed Development Dispersed by: animals – fleshy, nutritious fruit wind or water – lightweight Dormancy – embryo is alive, but not growing Long distance dispersal Germinate under ideal growth conditions Germination – early growth of a plant embryo Temperature and moisture

Attracting Insects