Page 137 - Science Course 1 (Book 1)

Mo4-L5a: How Do Plant Types Differ?

Meiosis produces Anther
eggs and sperm

Pollen Grains
containing sperm
Stamen nuclei Pollen

Stigma
style
Ovary
Egg
Mature Plants
produce flowers Seed

Fertilized egg
becomes embryo of
seed
Seeds germinates
to produce plant Soporophyte
(multicellular
Key Concept Mitosis dipolid) (2n)

How Do Plant Types Differ?
Zygote (2n)
How do asexual and sexual reproduction in
plants compare and contrast? Meiosis

Fertilization haploid
spores (n)

Mitosis

Gametes(n)
Gametophyte
Mitosis (Multicellular
haploid) (n)

When a male and a female sex cell combine,
fertilization occurs and a diploid cell forms.

That diploid cell is the beginning of the sporophyte
stage.
Plant Life Cycles
This cell divides through mitosis and cell division and
forms the sporophyte.
The two stages in the life cycle of every plant are the
gametophyte stage and the sporophyte stage.
Diploid zygote Diploid plant
The gametophyte stage begins with a spore, or
haploid cell.
Fertilization
Through mitosis and cell division, the spore produces
a plant structure or an entire plant called a
gametophyte. Sperm Egg Meiosis

Haploid Haploid spores

130