BIOLOGY LESSON NOTE ON CROP PROPAGATION

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Topic: Crop Propagation Class: Senior Secondary School 2 (SS2) Subject: Biology Specific Objectives By the end of this lesson, students should be able to: Define crop propagation. Differentiate between sexual and asexual propagation. Identify and explain various methods of crop propagation. Highlight the advantages and disadvantages of each method. Recognize common examples of crops propagated using each method. Lesson Content 1. Meaning of Crop Propagation Crop propagation refers to the process by which plants reproduce or are reproduced to give rise to new plants. This can occur naturally or be carried out artificially by farmers or agricultural scientists. It is a vital practice in agriculture that ensures the continuous production of food and other plant-based resources. 2. Types of Crop Propagation Crop propagation is broadly categorized into two main types: Sexual Propagation (Seed Propagation) Asexual Propagation (Vegetative Propagation) 3. Sexual Propa...
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BIOLOGY LESSON NOTE ON IRRITABILITY

 

Subject: Biology

Topic: Irritability

Class: SS1

Sex: Mixed

Instructional  Materials. Textbook, specimen, pictures, 

Aim of the Lesson: To help the learner understand the concept of irritability

Anticipated Problems: Because of advancement in class, most themes might be new to the learners and might result to difficulty in understanding

Possible Solution: The teacher explains the concept in details using illustrations and real objects.

Content Objectives: By the end of the lesson, learners should be able to;

  1. Define  irritability
  2. State the types of response
  3. Give examples of tropic movement

Time Table fit/ previous knowledge: The learner learnt about growth in their previous lesson

Set Induction: The teacher asks the student to observe the object on the table.

Differentiation Method/Multiple Intelligence: The teacher uses different teaching technique such as discussion, role playing, questioning and use of picture to ensure all the learner benefit from the lesson.

IRRITABILITY

Irritability is the ability of a living organism to response to stimulus

                CELL REACTION TO ITS ENVIRONMENT

All living things are capable of responding to internal and external stimuli. Plants and animals are able to detect and respond to changes in their environment.

TYPES OF RESPONSES

There are different types of responses or movement.

1. Taxis or Tactic movement: This is a directional type of response in which the whole organism moves form one place to another in response to external stimuli e.g. light, temperature, water e.t.c.

2. Nastism or Nastic movement: This is a type or response in which a part of a plant moves in response to non-directional stimuli such as changes in light intensity, temperature and humidity e.g. folding of leaflets of the mimosa plant when it is touched.

3. Tropism or the Tropic movement: Tropism is a type of response in which a part of a plant moves in response to a directional stimulus. The direction of the response is related to that of the stimulus. It may be positive if the plant part grows towards the stimulus and negative if the plant grows away from the stimulus.

Examples of tropism or tropic movements are:

1. Phototropism (Light).

2. Geotropism (Gravity).

3.Hydrotropism (Response to water)

4.Thigmotropism (Touch)

5.Chemotropism (Chemical)

6.Thermotropism (Heat)

The instrument for measuring tropism in plants is called Klinostat

Assessment plan. The teacher uses the following to assess the learners

Class work

  1. Define Irritability
  2. List the types of response

Home work

Write note on positive and negative tropic movement

Multiple choice questions.

1. Tropic movement in response to touch is known as

  1. Phototropism
  2. Geotropism
  3. Hydrotropism
  4. Thigmotropism

2. Tropic movement in response to gravity is known as

  1. Phototropism
  2. Geotropism
  3. Hydrotropism
  4. Thigmotropism

3. Tropic movement in response to light is known as

  1. Phototropism
  2. Geotropism
  3. Hydrotropism
  4. Thigmotropism

Evaluation

  1. Define  irritability
  2. State the types of response
  3. Give examples of tropic movement

Glossary

Phototropism: response to light

Geotropism: response to gravity

Hydrotropism: Response to water

Conclusion: Irritability is the ability of a living organism to response to stimulus

 


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