Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.
-
Upload
lea-rennard -
Category
Documents
-
view
224 -
download
5
Transcript of Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.
![Page 1: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/1.jpg)
Lesson planScience
Class 10th
Topic: Reproduction In OrganismsSub- Asexual Reproduction In Organisms
![Page 2: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/2.jpg)
GENERAL OBJECTIVES
• To develop scientific awareness among the students about reproduction in living things
• To aware the students about different parts of organisms related to reproduction.
• Types of reproduction.• To develop the inter disciplinary approach
for study in different subjects.• To make the students confident and
present topic in class.• To make students aware about their
surroundings & environment.
![Page 3: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/3.jpg)
SPECIFIC OBJECTIVES
To enable the students to know about asexual reproduction in organism
To know different modes of asexual reproduction
To get the students aware about different parts of a plant which take part in asexual reproduction
![Page 4: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/4.jpg)
PREVIOUS KNOWLEDGE TESTING
• See this picture and tell about this • Parents and children• How the continuation of race takes
place?• By Reproduction.
![Page 5: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/5.jpg)
• WHAT IS REPRODUCTION?• Reproduction is the process of formation of new individuals of
its own kind.
• WHY IS IT IMPORTANT?• Reproduction is important for the continuation of the race.
• WHAT ARE ITS DIFFERENT TYPES ?• Two types.• What are these?
Sexual Reproduction
AsexualReproduction
Reproduction
![Page 6: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/6.jpg)
Do you know what is Asexual Reproduction?
![Page 7: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/7.jpg)
Well students today we will discuss about Asexual Reproduction in organisms
![Page 8: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/8.jpg)
PresentationAsexual Reproduction
Asexual reproduction is the formation of new individuals from single parent (monoparental)
New individuals are similar to the parents. morphologically & genetically similar
organisms known as clone.
![Page 9: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/9.jpg)
How many types of Asexual Reproduction is?
![Page 10: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/10.jpg)
Types of Asexual Reproduction
Fission
Fragmentation
RegenerationBudding
Vegetative Propagation
Spore formation
![Page 11: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/11.jpg)
What do you means by fission?
• Fission means to break down of individual into two equal parts.
What are the name of these?• These are • 1 Binary Fission• 2 Multiple Fission
![Page 12: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/12.jpg)
(A)Fission
Binary FissionFavorable condition. eg. Protoza (amoeba).
Multiple Fissionunfavorable condition. eg. Amoeba , Plasmodium.
What are favorable conditions
![Page 13: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/13.jpg)
1.Binary Fission Can you give any example of binary fission?• Yes, Amoeba
• See the pictures and tell how many Amoebas are produced
• Two
![Page 14: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/14.jpg)
• Amoebas reproduce (make more amoebas) by a process called binary fission.• This means that one amoeba can
split in half and make two identical new amoebas.• In this process mitotic nuclear
division followed by cytoplasmic division
![Page 15: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/15.jpg)
(2) Multiple Fission
What is multiple fission?• Formation of more than two individuals
under unfavorable conditions .Can you give an example?• Yes , Amoeba and Plasmodium
![Page 16: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/16.jpg)
Can you describe this picture?
![Page 17: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/17.jpg)
amoebaCyst formation
Division of nucleus
Daughter cells formation New pseudopodispore or amoebas
![Page 18: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/18.jpg)
Fragmentation in Spirogyra
What is the name of this fission?
![Page 19: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/19.jpg)
(B) Fragmentation
• In multicellular organisms i.e. simple body organization .body breaks up into two or more parts .
• But it is not true in all multi cellular organisms
• i.e. specialized cell are organized and placed at specific position in the body.
![Page 20: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/20.jpg)
Do you know what these pictures represent?
These pictures show an out growth like structure
Budding In Hydra
![Page 21: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/21.jpg)
Budding- an individual grows out of the body of the parent.
Hydra Budding
New organism
Cactus Budding
![Page 22: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/22.jpg)
(C) Budding
• Budding- an individual grows out of the body of the parent. • Hydra use regenerative cells for
reproduction in the process of budding • Outgrowth or Budding is due to
repeated division of cells.
![Page 23: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/23.jpg)
Observe the surface of potato-A- ………..?B- ………..?
![Page 24: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/24.jpg)
How potato reproduces ?Ans :- By vegetative propagation.How many types of vegetative
propagation in plants?Ans :- By roots, stem and leaves.
Potato
![Page 25: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/25.jpg)
Vegetative reproduction by RootsSome plants use their roots for asexual
reproduction. Example: DahliaIn dahlia each root tuber can form a whole new
plant.
![Page 26: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/26.jpg)
Vegetative reproduction by Leaves
• This photo shows the leaves of the common ornamental plant Bryophyllum (also called Kalanchoë).
• Leaf margins produce tiny plantlets that fall off and can take up an independent existence.
![Page 27: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/27.jpg)
Can plants reproduce by artificial Vegetative propagation?
Ans:-yes
What is Artificial Vegetative propagation
Ans:- Propagation by stem cutting and grafting
![Page 28: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/28.jpg)
Artificial Vegetative propagation
Artificial methods used in agriculture & horticulture to propagate / grow new plants that are identical to the parent
28
![Page 29: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/29.jpg)
Grafting• Involves fixing /
binding together the cut surfaces of 2 plants (similar) so they grow as one.
• Useful qualities from both plants combined into one e.g. rose flower and thorn-less stem e.g. apple trees. 29
![Page 30: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/30.jpg)
30
![Page 31: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/31.jpg)
Layering
• A branch of a plant is bent over and pinned down into the soil at a node.
• It is covered over with soil & eventually new roots & shoots develop.
• Useful for the propagation of woody plants e.g. blackberry, gooseberry.
31
![Page 32: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/32.jpg)
32
![Page 33: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/33.jpg)
What is regeneration?Ans:-formation of new individual.
![Page 34: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/34.jpg)
(E)Regeneration
• Ability to give rise to new individual organisms from their body parts.
eg. Hydra Planaria.
![Page 35: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/35.jpg)
(F) Spore FormationUnicellular or multicellular, reproductive or distributional cells developing into a number of different phases of the complex life cycles of the fungi
![Page 36: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/36.jpg)
Latest technology for propagation of plants in laboratory (Micro- propagation)
• Some cells are removed from plant are placed in a dish with nutrients & growth regulators
• They grow into a group of similar cells called a callus
• Which develops into a small plant & then placed into compost.
36
![Page 37: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/37.jpg)
(Tissue Culture)
![Page 38: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/38.jpg)
Group Formation
Whole class will be divided into four groups:
Group No. 1 will be given different plants and show its different parts.
Group No. 2. will be asked to identify the plants which reproduce asexually with stem.
Group No. 3. will be asked to identify the plants which reproduce asexually with roots
Group No. 4. will collect the plants which reproduce through the leaves.
![Page 39: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/39.jpg)
Comment on this crop
![Page 40: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/40.jpg)
Activities• Collect water from the lake or pond that appear
dark green and contain filamentous structures. Observe it under microscope in school lab.
• Students will be asked to collect & identify the Organisms which reproduce asexually.
![Page 41: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/41.jpg)
Evaluation What is reproduction ?
Define asexual reproduction ?
Name the parts of a plant by which it can reproduce asexually.
Which part of the potato plant we eat?
Sheela has gone to a garden. She collected roots of Dahlia over there. She said that plant can not reproduce through these roots. Are you agree. Explain?
![Page 42: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/42.jpg)
Home Assignments
• Can you think of reason why more complex organisms can not give rise to new individuals through regeneration.
• Why asexual reproduction is not so common in higher animals?
![Page 43: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/43.jpg)
Home assignment
• Make collection of plants which reproduce through stem in your locality.
• Make list of plants whose roots are used in your kitchen as vegetable.
• List the ornamental plants which reproduce by artificial vegetative propagation in your locality.
![Page 44: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/44.jpg)
Exercise to develop research attitude among the students
• Students will be asked to visit A garden/ Nursery/ Polyhouse/ Tissue culture lab and prepare a complete Project report related to asexual reproduction.
• At the end of vacation they have to present their project report in the class.
![Page 45: Lesson plan Class 10 th Topic: Reproduction In Organisms Sub- Asexual Reproduction In Organisms.](https://reader037.fdocuments.in/reader037/viewer/2022102713/56649c715503460f949227f4/html5/thumbnails/45.jpg)
THANK YOU