Download Unit 4 Notes #6 – ANGIOSPERMS – “The - Mr. Lesiuk

Name: __________________
Date: __________
Unit 4 Notes #6 – ANGIOSPERMS – “The Flowering Seed Plants”
Body Plan:
- Many Angiosperms have a similar body plant to that of the Gymnosperms.
Including ________________________________________
- The key difference is the design of_________________________________________
_______________, the flower may account for their greater reproductive success
when compared to gymnosperms.
A) Flower Structure:
- All angiosperms _______________________________through their flower parts.
- Many angiosperms have________________________, a complete flower has both
________(produces pollen/sperm) and ___________(produces ovule/egg) structures.
- A complete flower consists of the following:
i) ________________- ________________(often green) encloses and ______________
the flower bud as it develops.
ii) _____________- Often brightly coloured to ________________________________
to facilitate pollination.
iii) ________________________- Specialized circle of fertile leaves have a thin
“_______________” with a pad-like “______________” at the top. The anther is the
site of _______________________________________
iv) _______________________The pistil consist of a wide base called the __________
an extending stalk called the __________and a small platform called the __________
B) Angiosperm - Stages of Sexual Reproduction
1) Pollen grains developed by the anther.
2) Flower petals or nectar attracts pollen-carrying insects, or pollen is delivered by
the wind.
3) Pollen grains land on mature STIGMA (female) during ______________________
4) _____________________________________________________________________
5) Migration of ____________ __________________down the tube.
6) Nucleus _________________________________________________________
7) Pollen tube ruptures once it penetrates the ovary
8) ____________________________________________ to form a diploid __________
while the other___________________________________________________________
__________________. This ____________ ________________goes onto form the
embryo’s food supply. The entire process is called _____________________________
9) Sepals, petals, and stamens then wither. The ovary swells and ovule/seed grows.
Often the _______________________________________________________________
Example: Apple, Orange, Cucumber, Avocado, Tomato
10) Seeds (mature ovules) have a period of dormancy from a few weeks to many
years before germination.
C) Complete vs. Incomplete Flowers
i) Complete flowers: Contain both sexes (common flower)
ii) ________________________________________________________________(Corn
silk and tassel, Willow fronds and kittens)
Advantages of Incomplete Flowers
1) Ensures _________________________. Therefore exchange of genetic material
with a different individual takes place. (____________________________________)
2) Cross-fertilization tends to produce _______________________________________
________________________of Incomplete Flowers
1) Other ______________________________for successful pollination to take place.
2) Must rely on insects or wind for this distant pollination. If it is a bad year for
insects or if there is a lack of wind, __________________________________________
D) Features that Gymnosperms Lack
1) Seeds are _____________________________________________________________
2) Both angiosperms and gymnosperms have xylem composed of tracheids (hollow
woody cells), but angiosperms also have larger “vessels”. This type of xylem is
_________________________________________________________________
3) Xylem in angiosperms also has________________________, causing the wood to
___________________________. Many angiosperm trees are referred to as
________________________________________________________
E) Angiosperms Classes:
Angiosperms are divided into two subclasses, based on the _____________________
__________________ they develop.
- A cotyledon ____________________________________________________________
_______________________________________________________
- Some angiosperms exhibit a ____________cotyledon (the________________), while
others exhibit __________cotyledons (the______________).
- Common monocots include: ______________________________________________
_________________Rye and Barley.
- Common dicots include: __________________________Cacti, and most other
Deciduous Forest Trees and Flowering Plants.
- They also differ in other respects as well:
Characteristic
Leaves
Monocot
Dicot
Stem Thickness
Most do not grow thicker
from year to year
Flower
Flower parts found in
multiples of ________
Tend to
______________________
from year to year
Flower parts found in
multiples
of ____________
Vascular Bundles In Stem
F) Uses of Angiosperms
1)
2)
__________________________________________
Cereal and grain crops
3)
___________________________________________
4)
_________________________