Transcript Parts of a Flower

Biology of Plants
Page 72 in your Notebook
• Divide into 4 parts
Leaves
Roots
Tissues/Stem
Flower
Biology of Plants
• Plants are alive, just like people and
animals. How do we know this? Living
things all do certain things:
- They grow and die.
- They need energy, nutrients, air, and
water.
- They produce young.
- They are made up of cells.
- They react to what's around them.
Plant Adaptations
• Think about the desert, how do the
plants differ there then here?
• What about the Alaska?
• Compare the plants in Minnesota with
the plants in New Mexico.
Plant Adaptations
• Plants have adaptations to help them
survive (live and grow) in different areas.
Adaptations are special features that allow
a plant or animal to live in a particular
place or habitat. These adaptations might
make it very difficult for the plant to survive
in a different place.
LEAVES
•
Photosynthetic organ of the plant,
used to convert sunlight into food
•
Photosynthesis Equation:
CO2 + H2O  C6H12O6 + O2
• Stomata: pores within the leaf
that open to let CO2 in and O2 out.
•
Guard cells open and close the
stomata.
•
Cuticle: waxy covering on leaves
that prevents water loss
Leaves
Leaves
• Leaves of conifers – (needle leaves) are
dark green in color to help absorb
maximum energy in areas of weak
sunlight or a greenish yellow in areas
of lots of sun to only absorb a little
energy.
Seeds
• Plants rely on wind and animals to
disperse their seeds.
– Stick to fur
– Animals can bury them
– Animals can eat them then digest it and pass
it through.
– Wind can also carry a seed.
– Float in water (size is not a factor)
Roots
•Roots act like straws absorbing water and
minerals from the soil.
•Tiny root hairs stick out of the root, helping
in the absorption.
•Roots help to anchor the plant in the soil so
it does not fall over.
•Roots also store extra food for future use.
•Tap root go deep into the earth in search of
water
•Fibrous roots don’t have to go deep, there are
many fibrous roots that spread just underneath
the surface of the soil
Roots
• Why are there different types of roots?
Tissues/Stems
• They act like the
plant's plumbing
system, conducting
water and nutrients
from the roots and
food in the form of
glucose from the
leaves to other plant
parts.
Tissues/STEMS
• Support plant
• Xylem transport water
• Phloem transport
nutrients
Flower
• Why are the petals of a flower brightly
colored?
• This is because their main job is to
attract insects, such as bees or
butterflies, into the flower. The insects
pick up pollen from the flower, and
carry it to the next flower they visit.
This is how most flowers are pollinated.
Parts of a Flower
Carpel (Female parts)
• Female part of the
flower where the
seeds are made.
• Stigma is covered
with a sticky
substance to catch
the pollen.
• The Ovary contains
the ovules (eggs)
Stamen (Male parts)
• Stamen is the male
part of the flower.
• Their job is to make
pollen.
• Anther contains the
pollen and the
filament holds the
anther up.
Sepal
• Sepals are special
types of leaves that
form a ring around the
petals.
• Their job is to protect
the flower while it is
still a bud.
Phototropism (photo = light)
• The growth or
movement of a plant
in response to a light
source.
Plant will grow towards
the light
Geotropism (geo = earth, soil, ground)
• Roots will grow
downward towards
the nutrients
• Stems will grow
upward toward the
light
Thigmotropism (thigmo - touch)
• Movement of a plant
or plant part in
response to stimuli or
touch
Thermotropism (thermo = heat)
• Movement of a plant
or plant part in
response to
temperature
Summary
• Plants through evolution have adapted to their
environment.
• Leaves are used in photosynthesis.
• Seeds can be carried by animal, wind, or water.
• Stems contain phloem which carries nutrients
and xylem which carries water.
• The flower attracts insects for pollination.
• Roots are used for H2O absorption.
• Carpel is the female organs  Stamen is the
male organs.