2. There are so many plants and trees that surround us.
Plants and trees not only provide us with food, fuels
and many other important things but are also a source
of fresh air and joy that surrounds us everyday.
3. There exist so many different types of plants and
trees, which have tiny differences among their
color, structure, as well as numerous physiological
differences.
4. There are two important groups of plants.
Angiosperms are flowering Gymnosperms are non-
plants flowering plants
5. Angiosperms are the largest group of plants in the plant kingdom
The name angiosperm is Greek in origin.
Angeion means vessel; sperma means
seed.
The seeds from these plants are formed
inside containers called fruits.
250,000 species.
6. Gymnosperms are plants that produce seeds in the open spaces of
cones. One good example of this is pine cones
The Greek word gymno means
naked, and sperma means seed.
In evolution, gymnosperms are more
primitive than angiosperms.
7. ANGIOSPERMS GYMNOSPERMS
This group consists of flowering Gymnosperms include all of the
ornamentals and all vegetables conifers: cedar, redwood, juniper,
and edible fruits. cypress, fir, pine, and the giant
sequoias
They are also the source of the Softwoods such as pine and fir
world's hardwoods. are used to make paper, lumber,
and plywood.
Angiosperms have ovules that are Gymnosperms do not produce
enclosed in a carpel. flowers
A carpel consists of a stigma, a Gymnosperms rely on the
style, and an ovary. airborne transport of their pollen
The seeds of angiosperms Most gymnosperms lack vessels
contain either one or two in the xylem (wood).
cotyledons-a seed leaf
8. Can you identify these plant types
from the pictures below?
GYMNOSPERM ANGIOSPERM
ANGIOSPERM ANGIOSPERM
9. 1. Class that includes plants whose seeds are not enclosed in
an ovule
GYMNOSPERMS
2. Class of plants in which the mature seed is surrounded by the
ovule
ANGIOSPERMS
3- Means a "naked seed"
GYMNOSPERMS
4. This group is often referred to as softwoods.
GYMNOSPERMS
10. 5. This group is often referred to as hardwoods.
ANGIOSPERMS
6. A good example is an apple.
ANGIOSPERMS
7. A good example is a pine tree.
GYMNOSPERMS
