3. Angiosperm
The term ‘angiosperm’ derives
from the two Greek words:
angeion meaning ‘Vessel’ and
sperma meaning ‘seed’.
Angiosperms (flowering plants)
are the largest group of plants on
Earth. Approximately 270,000
known species alive today.
4. Features of Angiosperm
I. Process of developed flowers and
fruits
II. Flower serves as the reproductive
organs for the plant
III. Flowers have a wide array of colors,
shapes and smells all of which are
for the purpose of attracting
pollinators
IV. Roots, stems and leaves
V. Xylem and phloem
6. Monocotyledons (monocots)
I. Embryo with single
cotyledon
II. Major leaf veins
parallael
III. Flower parts in multiple
of three
IV. Stem vascular bundels
scaltered
V. Example: Lilies,
Orchids, Grasses
Orchidaceae
Lilium
7. Dicotyledons (dicots)
I. Embryo with two
cotyledons
II. Major leaf veins
reticulated
III. Flower parts in multiples
of foure or five
IV. Stem vascular bundles
in a ring
V. Example: Roses,
Cactus, Tobacco,
Pumpkin
Cactaceae
Cucurbita
9. Xylem’s Structure and Function
I. Transports water and
mineral salt from
Roots Stem
Leaves
II. Unidirectional
III. Composed of hollow,
nonliving cells
(Continuous lumen)
IV. Provides mechanical
support to plant
because of lignified
10. Phloem’s Structure and Function
I. The function of phloem
tissue is to transport
dissolved sugars
(usually sucrose) from
where they are made-
the leaves- to where
they are needed- the
rest of the plant
II. In particular –
Growing point where
new cells are made
storage organs, often in
the roots ( think of
11. Importance of Angiosperm
I. Provide food and shelter for land
animals
II. Provide nearly all of our food,
directly or indirectly
III. Thier fibers are used to make
clothing
IV. Furniture comes from their wood
V. We extract medicines and
psychoactive drugs from them
