Lesson Plan of Bean & Maize Seeds
General Science Grade V
Students’ Learning Outcomes
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| Compare the structure & function of bean & maize seeds.
· List the functions of cotyledons.
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Information for teachers
· A seed is a small embryonic plant.
· The outer covering of a seed is called seed coat (Testa) which protects the tiny plant within it.
· The point where seed is attached to its stalk is called Hilum.
· The small pore outside the seed, from where air and light enter is called Micropyle.
· The part of seed which we can see after removing the seed coat is called an embryo.
· The embryo is a small plant, having one or two cotyledons, which store food material.
· The part of axis lying towards the pointed end of the seed through which first root arise is called radicle.
· The part of axis lying toward the other end (opposite to pointed end) of the seed through which first shoot arise is called Plume.
· A maize seed is an oval shaped and has one Cotyledon.
· The bean seed is kidney-shaped and has two Cotyledons.
Material / Resources
Flash cards / labeled pictures of bean and maize seed, textbook.
Worm up Activity
Conduct a brainstorming session (based on Grade 1V learning) with questions like:
· How does a plant begin its life? (Expected response: “plants grow from seeds”)
· What is present inside a seed that it makes a complete plant?
Recall the students’ previous learning (unit 1; Grade V) and ask them.
· How do the monocot and dicot seeds differ?
· Draw diagrams of bean and maize seed on board and explain its different parts.
Development
Activity 1
· Divide the students into 2 groups.
· Give soaked bean seeds to one group and ask them to note their observations in this table.
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Characteristics
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Observations
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Shape
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Colour
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Size
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Structure on outer surface
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· Give soaked maize seeds to other group and ask them to record their observations in this table.
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Characteristics
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Observation
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Shape
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Colour
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Size
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Structure on outer surface
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Activity 2
- Give soaked maize and bean seeds to each student.
- Ask students carefully remove the seed coat from the seeds.
- Ask; why a seed needs a ‘coat’
- Demonstrate the students how to look inside the seeds.
- Observe inside the seeds. Point out the radicle, plumule and cotyledons in seeds.
- Ask students to record their observations in the form of a table.
- Explain the functions of radicle, plumule, cotyledons and seed coat.
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Seeds
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Numbers of cotyledons
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Radicle
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Plumule
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Micropyle
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Seed coat
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Bean seed
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Maize seed
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Sum up / Conclusion
- A seed is a small embryonic plant.
- Its outer covering is called seed coat (Testa).
- The embryo consists of a radicle, a plumule and one or two cotyledons.
- The maize seed has one cotyledon while the bean seed has two cotyledons.
- Plant root arises from radicle. Plant shoot arises from plumule.
- The cotyledons store food material for the growing embryo.
Assessment
Ask following questions to the students:
—-how many cotyledons are there in a bean seed?
—-What is the function of micropyle?
—-What do you observe on the external surface of the seed?
—-Which part of seed gives rise to stem?
- Ask students to label the parts of the bean and maize seeds in the following diagrams.
- Involve the students in solving the questions given at the end of chapter / unit in textbook.
Follow up
- Ask the students to enlist name of seeds whose cotyledons are used as food?
- Collect different monocot and dicot seeds, preserve them in seed box or polythene bags and present them in front of the class.
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Seeds
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Monocot
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Dicot
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