Plant
Reproduction
Stages of Plant’s Life Cycle?
1. Sporophyte stage- plant
produces spores(seeds)
2. Gametophyte stageplant 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 ovulesstructure 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