Transcript 1. HOW ARE PLANTS DIVERSE?

1. HOW ARE PLANTS DIVERSE?
2. WHAT ARE GOOD USES OF PLANTS?
3. HOW CAN PLANTS BE BAD FOR US?
VASCULAR PLANTS
• Some do not produce seeds, some do
• Have specialized vascular tissues to transport water and food
• More widespread than non-vascular plants because they can
retrieve water with their roots.
Vascular Plants:
Body Structure:
Roots, Stems, and Leaves
System:
Xylem, Phloem
VASCULAR TISSUES
The two types of vascular tissue is Xylem and Phloem
Xylem: Carries water and dissolved ions from the roots to the stems and
leaves
Phloem: Carries dissolved
sugars from the leaves to all other
parts of the plant
VASCULAR, SEEDLESS
PLANTS
INCLUDES:
FERNS
CLUB MOSS
HORSETAILS
THEY HAVE XYLEM AND PHLOEM
THEY REPRODUCE BY SPORES
VASCULAR, SEED PLANTS
There are two groups of vascular seed plants:
GYMNOSPERMS
“CONIFERS”
ANGIOSPERMS
“FLOWERING”
•Produce protected seeds
•Produce seeds that are not
protected by an ovary
•Called “naked seeds”
•Do NOT produce flowers or fruit
•Produce Cones
•Depend on Wind for pollination
•ALL produce flowers and fruit
•Fruit is a ripened ovary with
seeds in it
•Subdivided into Monocots and
Dicots
•Depend on wind, insects, and
animals for pollination
ANGIOSPERM
SEED STRUCTURE
Embryo
Seed
Coat
Food
Supply
A seed is a plant organ that contains an embryo, along
with a food supply, and is covered by a protective coat.
ANGIOSPERM
•Petals are usually the
colorful structures at the
top of a flower stem.
Petals
A flower’s structure is genetically determined
and usually made up of four kinds of organs:
sepals, petals, stamens, and pistils.
ANGIOSPERM
• Sepals are usually leaf-like and encircle the
peduncle below the petals.
ANGIOSPERM:
The Male Reproductive
Parts
Anther
Stamen
Filament
• The male reproductive part of the flower
includes the filament (tube) and anther (where
the pollen is.
• The entire male part is called the stamen.
ANGIOSPERM:
The Female Reproductive
Parts
Stigma
Style
Pistil
Ovary
• The pistil is the female organ of the flower.
• The bottom portion of the pistil is the ovary, a
structure that contains ovules (eggs).
FERTILIZATION
Pollen grain
Stigma
Style
Ovary
Egg cells
• As the seeds
develop, the
surrounding
ovary
enlarges and
becomes the
fruit.
Fruit formation
Click image to view movie.
Seeds used to be
zygote.
Pulp of fruit
used to be
endosperm,
or food for
embryo in
the seed.
Question 4
Which vascular tissue moves sugars to all parts
of the plant?
A. Roots
B. Leaves
C. Xylem
D. Phloem
The answer is D.
Question 5
Which is the male reproductive part of the plant?
A. 1
B. 2
C. 3
D. 4
The answer is A.
Question 6
In flowers, the _______ receives the pollen.
A. peduncle
B. sepal
C. stigma
D. anther
The answer is C, stigma.
Stigma
Petals
Style
Ovary
Anther
Stamen
Filament
Sepal
Peduncle
Pistil
Question 7
The _______ encircle the stem below the
petals.
A. stamens
B. anthers
C. sepals
D. styles
The answer is C, sepals.
Stigma
Petals
Style
Ovary
Anther
Stamen
Filament
Sepal
Peduncle
Pistil
Question 8
Which part of the fruit used to be the zygote?
4
A. 1
B. 2
C. 3
D. 4
1
The answer is A.
2
3