Plant Reproduction Stages of Plant’s Life Cycle? 1. Sporophyte stage- plant produces spores(seeds) 2. Gametophyte stage- plant produces sperm cells & egg cells * See p205

How Do Plants Reproduce?  All plants undergo sexual reproduction that involves fertilization. The fertilized egg is now called a zygote.  Two types of plants: gymnosperms (cone producing plants) and angiosperms (flowering plants)

Gymnosperm Reproduction Cycle (p209):  1. Most produce 2 types of cones (male and female), which are covered with scales.  2. (A)Male cones produce pollen grains. (B)Female cones develop into ovules- structure that contains the egg cell. The ovule later becomes the seed.  3. Two egg cells form inside each ovule on the female cone.  4. Pollination: transfer of pollen from male cone to female cone.

 5. Fertilization: The ovule closes and seals in the pollen. The scales also close. The fertilized egg cell inside the ovule becomes a zygote.  6. Female cones remain on the tree while the seeds mature. Female cone increases in size. Male cones fall off the tree after they shed their pollen.  7. When seeds are mature, the scales open. The wind shakes the seeds out of the cone and carries them away.

Angiosperm Reproduction Cycle (p210):  1. Flower is produced.  2.(A) Cells in the anther produce pollen.  2. (B) Inside the ovary, egg cell is produced in each ovule.  3. Pollen grains are trapped on the stigma.  4. The pollen grain produces a pollen tube that grows into the ovule. A sperm cell moves through the pollen tube and fertilizes the egg cell.

 5. Ovule develops into a seed. Fertilized egg becomes the seed’s embryo.  6. The ovary develops into a fruit.  7. A seed grows into a new plant.

Draw, label and color a life cycle for a gymnosperm and an angiosperm