Objective: Draw out the life cycles of
mosses and ferns.
Moss Life Cycle
WHAT IS MADE WHERE
Archegonium: produces eggs, located on female
gametophyte
Antheridium: produces sperm, located on the male
gametophyte
Sporangium: produces spores (future gametophytes),
located on the sporophyte
TERMS TO KNOW
Gamete: male or female sex cell
Zygote: Embryo
Diploid: full set of chromosomes (humans = 46)
Haploid: Half the number of chromosomes (humans
= 23)
Gametes are haploid.
Zygotes are diploid
1
Sporophyte
Antheridium
Male
Gametophyte
Archegonium
Female
Gametophyte
antheridium
archegonium
2
Objective:
1) Draw and label
the parts of the
flower.
2) 2) Identify flower
location
strategies of
different
pollinators.
3
The Flower Parts and Their Functions
Sepals: protect flower from damage
Petals: attract pollinators
Stamens: produce pollen
2 Parts:
1) Filament – stalk that
holds the anther
2) Anther – pollen producing
sac
Pistil: produce ovules (eggs)
3 Parts
1) Stigma – top part of pistil where
pollen lands
2) Style – tube that connects stigma
to the ovary
3) Ovary – where the ovules develop
Pollinators:
Bees: locate flowers by scent first and then by color
(preferably blue or yellow) and shape.
Moths: locate flowers by scent first and then the
color white
Flies: locate flowers that emit a rotten smell.
Hummingbirds: locate flowers based on color
(preferably red).
4
http://images.search.yahoo.com/search/images/view?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2
Fimages%3Fp%3Dflower%2Banatomy%2Bpicture%26ei%3DUTF-8%26fr%3Dyfp-t471%26x%3Dwrt%26js%3D1%26ni%3D21&w=321&h=300&imgurl=personal.nbnet.nb.ca%2Fkvhs%2Fbiology%2Fflower.jpg
&rurl=http%3A%2F%2Fpersonal.nbnet.nb.ca%2Fkvhs%2Fbiology%2Fflower.html&size=16.4kB&name=flower.jpg&p=flower+
anatomy+picture&type=jpeg&no=1&tt=597&oid=8724e537d772cab2&ei=UTF-8
http://www.shieldsgardens.com/images/Clivia_Flower_anatomy_4m2.jpg
Objective: Draw an illustration that explains the process of
angiosperm double fertilization.
http://www.rowellsinn.com/images/Fall-Folliage-Barn-sm.jpg
5
THE LIFE CYCLE OF AN ANGIOSPERM INCLUDES
A PROCESS CALLED DOUBLE FERTILIZATION.
STEPS TO DOUBLE FERTILIZATION
1)EACH POLLEN GRAIN CONTAINS 2 SPERM
CELLS.
2)ONE SPERM FERTILIZES THE EGG CELL TO
FORM A ZYGOTE.
3)THE OTHER SPERM FUSES WITH 2 OTHER
“EGG-LIKE” CELLS TO MAKE THE ENDOSPERM.
DAY 3 OF CHAPTER 25
NOTES
6
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