APSB - 7 - Science :: Reproduction in Plants

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Go To: APSB-Science-Grade 7

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[Contributor - Gayathri Arun Kumar]

Dear Volunteer,


Please find below the detailed lesson plan and PPT for this chapter in the language mentioned against the respective link. While the lesson plan will give an overall flow of the lesson, the PPT will include lesson flow as well as the presentations for the class.


https://drive.google.com/open?id=1vpo-bTtj08w02XAXmrzSzczhsmOUOKw9 (lesson Plan - English)


https://drive.google.com/open?id=1VtkxokSWmbC66SkGuaUcchuvDAJIvgTY (PPT - English)

You may use the content as it is or download and modify them to suit the students requirements.


If you feel any major modifications or additions are carried out by you in the form of adding any new activity, presentations, videos etc. we request you to send the modified version to submitcontent@evidyloka.org for enabling upload the modified version.


The worksheets of the lesson can be accessed from the worksheet tab.


Kindly rate the lesson plan and share your suggestions and comments on the lesson plan in the comments box below. Your valuble suggestions and comments will help us to improve the content.


[Author - Kripa S]


1. Take a fresh potato. Observe the scars on it with the help of a magnifying glass. You may find bud(s) in them. These scars are also called “eyes”. Cut a few pieces of a potato, each with an eye and bury them in the soil. Water the pieces regularly for a few days and observe their progress. What do you find?(TEXTBOOK)


[Contributor - Gayathri Arun Kumar]

Lesson Plan version 1.1 activities

1. Collect flowers of, say, Datura, Chinarose (Hibiscus), Cucumber, Bottle guard, Tridax, Sun flower, Ipomea etc. Observe these flowers. Are they of the same size and shape? Try to draw the flowers collected and write their names if you know them. We shall now study the Datura flower to know more about the parts present in a flower (floral parts).Try to draw it’s shape in your note book.

2. Collect as many flowers from your surroundings as you can. See that you have at least a type of melon or gourd flower as well. Now observe different parts in each flower. Record your observations

3. Collect hibiscus, cucumber, bitter gourd, datura, ipomea, bottle gourd flowers etc. Observe the different parts in them. Record your observations in the table (see if you can collect all these, in case you can’t, take the help of books present in your school library or elsewhere.

4. Collect a pistil and fruit from datura plant. Cut the transverse section of both ovary of pistil and fruit. Observe the internal structure of both the section cuttings with the help of a hand lens. Are there any similarities between these two? Collect pistil and fruit of cucumber, bhendi (Ladies finger), cotton and beans and do the above activity. Write your observations. What similarities do you see between the ovary and fruit of the same species?

5. Observe a bottle gourd plant in a garden. It has unisexual flowers i.e. male and female flowers separately. Select 10 female buds of bottle guard, cover with a polythene bag loosely tying the bag on a stalk. Make some tiny holes in the bag with the help of a pin.

Two days later observe the buds blooming. (Now collect the pollen grains from a male flower of the Bottle gourd plant). Pluck the stamens of male flower and shake to collect pollen grain in a sheet of paper. Twisting cotton wool over the tip of a match stick prepares a brush. Now uncover five of the ten female flowers. Apply the pollen grain on to the stigma of these flowers with the brush. The pollen grains stick to the stigma. Cover the flowers again with polythene bag. Remove all male flowers from the plant. So that no pollen grain reaches the remaining female flowers.

6. Take two slides. Put 2-3 drops of water on them. Add some sugar grains to water on one slide. Now put some pollen grains of Hibiscus flower on both the slides. After one hour observe under microscope. In which slide do pollen grains germinate and why?

There are some substances present on the stigma which promote the germination of the pollen grains. During germination a tube grows from the pollen grain. This tube ultimately reaches the ovary through the style with the male part. This male part fuses with the female part in the ovule of the ovary. Fusion of units of male and female parts to form a structure called as zygote is called Fertilization.

7. Take some water in a glass tumbler. Mix a tablespoon of sugar and half spoon of yeast powder you get in the market, in the glass tumbler. Cover the glass and leave it undisturbed for a day. On the next day place a drop of the solution on a slide and cover it with a cover slip and examine it under a microscope. You will be able to see budding yeast cells

8. Take a slice of bread cover it with a vessel and leave it undisturbed for two or three days. Thereafter you will find the slice covered with grey coloured fungus called bread mould. Let it stand for three or four days. The whole growth appears like a black powder like matter. Transfer this powder with a thin stick on a fresh slice of moist bread. Observe what happens after every day and note.


[Contributor - Supriya]

https://drive.google.com/open?id=11dQcBW_PnsFr8okJWSoqq5RP1l7sE_pG (Question Bank - English)

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