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PLANTS

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by

Laura Medina Sánchez

on 26 March 2015

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Transcript of PLANTS

Sexual reproduction in plants
Takes places inside the
flower
when two reproductive cells from two different plants come together. This generates a new plant that is similar to them.
Flowers are the reproductive organs in most plants and have
male
and
female
reproductive organs.
Reproductive organs
PLANTS
Asexual reproduction in plants
Characteristics of
plants
Plants need four substances to make their own food:
Plant nutrition
How do plants grow
How do plants respond to their environment
Activities
Activity
Match each organ with its function:
Activity
Order the photographs and explain the changes to the tree:
FINAL TASK
Experiment
1. Put one yoghurt container in the fridge and the other one in a warm room.
Roots Produce oxygen
Stems Sexual reproduction
Leaves Absorb water and minerals
Flowers Distribute substances
2. Every two days, lift up the cotton wool discs on the top and take photos.
3. Write down the changes you observe, including the temperature of the fridge and room. Remember to keep the cotton wool wet!.
And finally appear this:
Plants make their own nutrients through
photosynthesis .
During the process, plants absorb carbon dioxide and water with minerals and release oxygen into the air.
INTRODUCTION
- Characteristics of plants
Classification of flowers
Male flower
The male flower produces
pollen
.
Female flower
The female flower produces
ovules
.
Hermaphrodite flower
In many flowers, the
male
and
female
parts are inside the same flower.
- Plants nutrition
Photosynthesis
- Sexual reproduction in plants
This process takes place in green leaves during the day.

Leaves absorb energy from sunlight through a green pigment called
chlorophyll
and use it to produce glucose and oxygen.

- Asexual reproduction in plants
- How do plants respond to their
environment
Brown
Pollination of flower
Wind
,
insects
and other
agents
can accidentally transport pollen from one flower to another.
Pollination occurs when pollen reaches the pistil and travels through until it fertilises the
ovule
. This is called
fertilisation.
Then the
ovary
becomes a fruit and the ovule becomes a
seed
. When seed fall to the ground and germinate, a new plants grows.
Water
Elements of photosynthesis.
water
+
carbon dioxide
+
minerals
sunlight
=
Sunlight
Vocabulary
glucose
+
carbon dioxide
oxygen
Plants get these substances using three main organs
Cell:
the functional basic unit of life.
Germinate:
to sprout or grow.
Respirati n
Respiration is related to how plants get energy.

During respiration, plants absorb
oxygen
from the air.
Then, the oxygen and nutrients are transformed into


energy .
Finally, the plant releases carbon dioxide

and water steam into the air.
Reproduction in non-flowering plants
LEAVES
- Capture sunlight and carbon dioxide.
- They use the sunlight, carbon dioxide, water and minerals to make
NUTRIENTS
Non-flowering
plants don't have flowers or seeds. So, they use
spores
to reproduce. Ferns reproduce this way.
STEMS
Reproduction in non-flowering plants
1.
Sori
(singular, sorus) are sacks that contain thousands of
spores
. They are located under the fern leaves.
2. Spores fall to the ground and form organs that produce
reproductive cells
.

3. After
fertilisation
, a new fern begins to grow.
Fern life cycle
- Keep the plant vertical
- The trunk of a tree is a thick stem
Plants need energy 24 hours a day. That is why respiration occurs during the day and at night.
- It to carries water, minerals and nutrients to other parts of the plant through
VESSELS
ROOTS
- Allow plants to take water and minerals
from the soil.
- Some plants keep nutrients in their roots
Respiration
Fragmentation:
type of asexual division. The parent plant is divided into two parts and is almost always identical.
Stolons
Tubers
Bulbs
Rhizomes
Cuttings
Many plants can reproduce through
fragmentation.
In a fragmentation, new plant grows from a
fragment
of the parent plant.
1. First, a small fragment breaks off the plant.
2. Then, the fragment falls to the ground and germinates
3. Finally, a new plant begins to grow. This new plant is an identical replica of the parent plant.
- Activities.
Non-flowering plants
CLASSIFICATION OF PLANTS
FLOWERING PLANTS
These have organs like FLOWERS, FRUITS AND SEEDS that help them to reproduce. There are two types:
-
Angiosperms
: are plants that grow fruit with seeds.
-
Gymnosperms
: are plants that have seeds but do not have fruits.
This type don´t have seeds. Non-flowering plants have two types:
-
Ferns
: have roots, leaves and stems. Fern spores are formed on the underside of the leaves.
-
Mosses:
don´t have roots, leaves or stems. Moss spores are produced in capsules which are at the end of the filament.
Soil:

material in which plants grow.
Nutrients:
substances that living things need in order to grow
Vessel:
a tube which transports liquids
Are aboveground stems.
Grow horizontally.
The develop roots that produce a new plant.

Strawberries
Are underground stems.
Tubers store many nutrients that they get from the soil.

Potatoes
TUBERS
ROOT
Are the bottom of the stems.
Grow underground.
Bulbs store nutrients for the plants.
Each bulb gives rise to a new plants.

Example: Garlic
Stems
Bulb
Roots
Are underground stems.
Grow horizontally.
New plants grow from these stems.

Are stems that produce new roots when they are separated from the parent plant.
Types of fragmentation
Plants can move
There are two different ways plants move:

In
nastic movements
, the movement of the plant doesn't involve growth. For example: carnivorous plant suddenly closes its leaves when an insect touches it.

Tropic movements
occur when plants move towards from a stimulus and involve growth. For example: plants grow towards sunlight
Plants respond to the seasons
Plants respond to environmental changes in
light
,
temperature
and
humidity
and this influences their life cycle.
Beech trees are deciduous. Observe how the beech tree responds to weather changes in each season.
Deciduous trees:
trees that lose their leaves in the cold seasons.

Geraniums



Grapevines



- Classification of a plant
Asparagus

Iris
Full transcript