2. What is a flower?
The flower is the reproductive unit of
some plants. Parts of the flower include
petals, sepal, one or more carpel's
(the female reproductive organs), and
stamens (the male reproductive
organs).
3. Types of Flowers
• Perfect Flower -has both male and
female reproductive organs.
• Imperfect Flower- has only male
reproductive or only female reproductive
organs. Some plants have both male and
female flowers, while other have males on
one plant and females on another.
4. Types of Flowers
• Complete Flower- has a stamens, a pistil,
and sepals.
• Incomplete Flowers- lack one of these
parts.
6. The sepals protect
the flower before it
opens. The small
leave under the
flower.
A group of sepals is
called calyx.
7. The petals attract
pollinating insects
with their bright
color and attractive
scent.
A group of petals is
called corolla.
8. The stamens are the
male part of the
flower.
•The plant makes
pollen in the part of
the stamen called the
anther.
9. •The stigmas the top
of the female part of
the flower.
•The pollen from
another flower collects
on the stigma’s sticky
surface.
10. •The ovary protects the ovules.
It is the female reproductive organ.
• Pollen travels to the ovules and
fertilization takes place.
•Now the ovules will develop into
seeds.
11. A tube on top of the
ovary. Another female
part of the flower. This
is the long stalk that
supports the stigma.
15. Sexual Reproduction in
Plants
(Pistil)
Male Parts
Female Parts
pollen (male) + ovule (female) → single-celled zygote → multi-celled
embryo (contained in a seed) → new individual
16. Pollen is produced in
the male organs of the
flowers - anthers.
Pollination occurs
when pollen is
transferred from the
anthers to the female
organs by wind or by
animals. If the female
stigma is receptive to a
pollen grain, the pollen
produces a pollen
tube, which grows
through the female
tissue to the egg,
where fertilization
takes place by the
sperm nucleus.
Sexual ReproductionSexual Reproduction
in Flowering Plantsin Flowering Plants
18. Which is Better?
It depends!
Asexual Reproduction
• advantages
– does not require special
cells or a lot of energy
– can produce offspring
quickly
– in a stable environment
creates large, thriving
population
• disadvantages
– limited ability to adapt
– face massive die-off if
environment changes
Sexual Reproduction
• advantages
– lots of variation within a
species
– able to live in a variety of
environmental settings
– able to adapt to changes
in the environment
• disadvantages
– needs time & energy
– produce small populations
47. 1.Flowering plants( Angiosperm)
• Have roots, stems , leaves , and flowers.
• They form seeds which come from
flowers.
• Seeds are covered by a “seed coat”
• They have vascular or transport system
• --it is used for carrying food and water. It is
composed of tiny tubes that run through
the plant.
• These carry nutrients and
50. 2.CONE BEARING-
(GYMNOSPERM) (CONIFERS)
• They are plants that produces cones.
• They have well developed
roots, stems and needle-shaped
leaves.
• They do not bear flowers.
• Their seeds do not have coverings.
• They have naked seed. They have
both male and female cones.
52. 3.Ferns (Pteridophytes)
• They have roots, leaves and stems.
• Their leaves are popularly
known as fronds.
• FRONDS- an often large, finely
divided leaf, especially as applied to
the ferns and certain palms.
53. Activity:
• Let us examine the leaf of a fern
using a magnifying glass.
What have you observe at the
back of the fern’s leaf?
55. 4. MOSSES ( Bryophytes)
• "Bryon"—moss
"Python“-- plant
• They are simple green plants.
• They attach themselves to damp
rocks.
• They have no xylem and phloem.
56.
57.
58. A. Flowering Plants
Classification of Plants as to their
number of seeds.
(Seed-Producing Plants)
Cotyledon- provides food for the growing
plant
1.Monocotyledon(Monocot)
They have one cotyledons (seeds).
2.Dicotyledon(Dicot)
They two cotyledons (seeds)
.
59.
60.
61. B. Non-Flowering Plants
1.Those without true stems,leaves and
roots like the mosses.
2.Those with vascular systems,and they are
sub-divided into plants without cones like the
ferns and those with cones or the cone
bearing plants like the pine trees or the
gymnosperms.
62.
63. Monoecious = 1 House
• refers to a
species
• separate male
and female
flowers on the
same plant
Black Alder
male catkins and female strobili
64. Dioecious = 2 Houses
• refers to a species
• separate male and female flowers on
different plants
67. I.Identify the classification of the
following plants.
Write: A- Angiosperms
B- Bryophytes
C- Gymnosperms
D- Pteridophytes
___1. Pine tree ___5. Agoho tree
___2. Coconut tree
___3. Club mosses
___4. Liverworts
68. II. Identify the science concept
that best complete each statement
below.
6. Seeds enclosed in a fruit are called
(gymnosperms, angiosperms).
7. Dicots have ( 1, 2) cotyledon/s.
8. Monocots have (netted, parallel)-
veined leaves.
9. Foods passes through the (xylem,
phloem).
69. II. Identify the science concept
that best complete each statement
below.
10. In conifers, seeds are found in a
(fruit, cone).
11. Cotyledon provides (food, water)
for the growing plant.
12. Mosses live in (dry, moist) places.
71. Pointers:1. Human Reproductive System:
Parts and Functions; Ailments
2. Puberty
3. Menstrual Cycle
4. Asexual and Sexual Reproduction
in Animals
5. Asexual and Sexual Reproduction
in Plants
6. Estuarine Ecosystem (Abiotic &
Biotic Factors)
75. Quiz:
Classify the plants into: flowering,cone-bearing, fern, mosses by writing the
plant in the column where they belong.
Pine tree liverwort club moss acacia agoho
Caimito okra avocado gumamela eggplant
Flowering Cone-Bearing Ferns Mosses
