This document provides an overview of plant reproduction, including pollination, fertilization, and seed dispersal. It defines pollination as the transfer of pollen from the anther to the stigma. The pollination process involves a bee or butterfly carrying pollen between flowers. Fertilization is the joining of pollen and ovule to form a seed. It defines key terms like stigma, style, ovary, and ovules. Seed dispersal methods help plants disperse their seeds through various means like wind, water, or animals to prevent overcrowding and establish new colonies.
this topic objectives are: differentiate self- pollination and cross pollination,draw self-pollination in plants and appreciate the importance of insects in pollination.
REPRODUCTION
Reproduction is the capacity of all living things to give rise to new living things. It includes the transmission of hereditary material from the parent/parents.
The two types of reproduction are:
Asexual Reproduction
Sexual Reproduction
ASEXUAL REPRODUCTION
Is the simplest form of reproduction. Occurs in plants, animals, bacteria, and protists Requires one parent. Is more reliable than sexual reproduction. Doesn’t allow for any type of genetic variation.
TYPES
Sporulation
Fragmentation
Regeneration
Binary Fission
Budding
Vegetative propagation
SPORULATION
Spore is a reproductive cell that produces a new organism.
Spores are unicellular if conditions are right a spore will develop into a new individual.
They can be carried by the wind, water, or animals
FRAGMENTATION
When a organism is broken into more than one part.
Organism must have good regeneration abilities.
Create many new organisms quickly.
REGENERATION
An organism can replace/re-grow an injured or lost part
Regeneration in plants from
Roots
Stem
leaf
Regeneration in animals
For simple organisms
No vertebrates have this power
Examples are starfish and the salamander
BINARY FISSION
One parent dividing into two by mitosis
Offspring are always genetically identical
Cells may stay close together to form filaments or colonies
Examples-Bacteria and Amoebas
BUDDING
Form on part of the parent by growing an outgrowth which then detaches
Example- is Hydra and Yeast
Offspring will always be genetically identical to the parent
VEGETATIVE PROPOGATION
Plant parts make new plant
Reproduction is very quick
Disadvantage: many plants grow close to each other
Bulbs
– Underground stem
– Surrounded by colorless leaves
– Colorless leaves protect the bulb
– The green leaves store the food
Rhizomes
– Underground stem
– They store food for new plant
– At the end of Rhizomes nodes
Runners(strawberries)
– They are above ground.
– Stems – Nodes form at the end of Runners
– They grow outward
Tuber (potatoes)
– Underground stem
– Stores food
– The nodes eat the tuber
– Potatoes have eyes / buds to make new tubers and or reproduce
Grafting
– Surgically connecting two similar plants
– Ex. Apples – Not done naturally
Cutting
– Cutting off a stem or leaf to reproduce a new plant
– Must be in wet or moist area
– Combination of regeneration and fragmentation
– Not done naturally
Cloning
What is cloning?
Cloning is the creation of an organism that is an exact genetic copy of another. This means that every single bit of DNA is the same between the two!
How does one go about making an exact genetic copy of an organism? There are a couple of ways to do this: artificial embryo twinning and somatic cell nuclear transfer.
7th grade Life Science Powerpoint on the basics of plant reproduction. Flowers, pistil, stamen, pollination, fertilization, pollen dispersal, seed dispersal.
this topic objectives are: differentiate self- pollination and cross pollination,draw self-pollination in plants and appreciate the importance of insects in pollination.
REPRODUCTION
Reproduction is the capacity of all living things to give rise to new living things. It includes the transmission of hereditary material from the parent/parents.
The two types of reproduction are:
Asexual Reproduction
Sexual Reproduction
ASEXUAL REPRODUCTION
Is the simplest form of reproduction. Occurs in plants, animals, bacteria, and protists Requires one parent. Is more reliable than sexual reproduction. Doesn’t allow for any type of genetic variation.
TYPES
Sporulation
Fragmentation
Regeneration
Binary Fission
Budding
Vegetative propagation
SPORULATION
Spore is a reproductive cell that produces a new organism.
Spores are unicellular if conditions are right a spore will develop into a new individual.
They can be carried by the wind, water, or animals
FRAGMENTATION
When a organism is broken into more than one part.
Organism must have good regeneration abilities.
Create many new organisms quickly.
REGENERATION
An organism can replace/re-grow an injured or lost part
Regeneration in plants from
Roots
Stem
leaf
Regeneration in animals
For simple organisms
No vertebrates have this power
Examples are starfish and the salamander
BINARY FISSION
One parent dividing into two by mitosis
Offspring are always genetically identical
Cells may stay close together to form filaments or colonies
Examples-Bacteria and Amoebas
BUDDING
Form on part of the parent by growing an outgrowth which then detaches
Example- is Hydra and Yeast
Offspring will always be genetically identical to the parent
VEGETATIVE PROPOGATION
Plant parts make new plant
Reproduction is very quick
Disadvantage: many plants grow close to each other
Bulbs
– Underground stem
– Surrounded by colorless leaves
– Colorless leaves protect the bulb
– The green leaves store the food
Rhizomes
– Underground stem
– They store food for new plant
– At the end of Rhizomes nodes
Runners(strawberries)
– They are above ground.
– Stems – Nodes form at the end of Runners
– They grow outward
Tuber (potatoes)
– Underground stem
– Stores food
– The nodes eat the tuber
– Potatoes have eyes / buds to make new tubers and or reproduce
Grafting
– Surgically connecting two similar plants
– Ex. Apples – Not done naturally
Cutting
– Cutting off a stem or leaf to reproduce a new plant
– Must be in wet or moist area
– Combination of regeneration and fragmentation
– Not done naturally
Cloning
What is cloning?
Cloning is the creation of an organism that is an exact genetic copy of another. This means that every single bit of DNA is the same between the two!
How does one go about making an exact genetic copy of an organism? There are a couple of ways to do this: artificial embryo twinning and somatic cell nuclear transfer.
7th grade Life Science Powerpoint on the basics of plant reproduction. Flowers, pistil, stamen, pollination, fertilization, pollen dispersal, seed dispersal.
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2. Table of Contents
1. What is Pollination? 6. Seed Dispersal Methods
2. Pollination Process 7. Vocab. 1
3. What is Fertilization? 8. Vocab. 2
4. Fertilization Process 9. Vocab. 3
5. Seed Dispersal 10. End
3. What is Pollination?
The transfer of pollen from the anther to
the stigma.
Table of Contents
4. Pollination Process
Plant grows and eventually flowers
Bee/Butterfly visits flower and is dusted in pollen
Bee/Butterfly visits another flower and the pollen
rubs onto the stigma
Flower dies and seed pod develops. Some plants
develop fruit around the seed ex. Blackberry
Seed dispersal
A seed germinates
Table of Contents
6. Fertilization Process
Pollen lands on stigma
Pollen goes down the style and enters
the ovary
Fertilizes ovules
Ovary swells as seed ripens
Table of Contents
7. Seed dispersal
Plants need to disperse their seeds away
from themselves to stop overcrowding
and to create new colonies.
Nearly all seeds are produced within
“fruits”.
These fruits enable seeds to be dispersed
Table of Contents
in a variety of ways.
8. Seed Dispersal Methods
Wind Method Catching a Lift Method
Animal Food Method
Bursting Method
Drop and Roll Method
Shakers Method
Further description of
Water Method
each methods
Table of
9. Vocabulary (Female
Organs)
Stigma- the sticky part of the pistil that
pollen sticks to
Style- is long outgrowth of the ovary that
collects pollen from the stamens
Ovary- the base part of the pistil that holds
the ovules
Ovules- the unfertilized seeds of the plant
Table of Contents
10. Vocab. cont’
Pistil (carpel) - the female part of the flower
that contains the stigma, ovary, style, and
ovules
Anther- the part of the flower that holds the
Male Organs
pollen
Filament- the long thread-like part of the
flower that holds the anthers out so insects
can get to the pollen
Table of
11. Vocab. cont’
Petal- the colorful part of the flower that
attracts insects and other pollinators
Receptacle- the top of the flower stalk that
bears the flower parts
Sepal- the part that covers the outside of a
flower bud to protect the flower before it
opens
Germinate- to develop into a plant or
individual, as a seed, spore, or bulb.
Table of Contents
12. Resources
Seed dispersal:
http://www2.bgfl.org/bgfl2/custom/resources_ftp/client_ftp/ks2/science/plants_pt2/dispe
rsal.htm
Original website of the lessons:
http://www.gamequarium.com/plants.html
Fruits:
http://urbanext.illinois.edu/gpe/case4/c4f-enlarge.html
Flower Parts definitions:
http://urbanext.illinois.edu/gpe/case4/c4m1.html
Fertilization definition and process:
http://urbanext.illinois.edu/gpe/glossary/fertilization.html
Plant reproduction activity:
http://www.ngfl-cymru.org.uk/vtc/plant_repro/eng/Introduction/activity1pop.htm
Plant reproduction activities and pollination process:
http://www.ngfl-cymru.org.uk/vtc/plant_repro/eng/Introduction/activity2pop.htm