Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: 1st Term
Week: 11
Age: 15 years
Duration: 45 minutes
Subject: Biology
Curriculum Theme: Biology
Previous Lesson: Irritability.
Topic: MOVEMENT
Subject Matter: Movement definition and importance, cyclosis in protozoa, organelles for movement, phototropic response of shoots, geotropic response of roots and shoots, growth movement regulated by auxins, types of reproduction sexual and asexual, differences between sexual and asexual reproduction, meiosis.

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define movement and state its importance to living organisms.
Describe cyclosis in protozoa.
Identify various organelles used for movement in different organisms.
Explain the phototropic response of shoots and the geotropic response of roots and shoots.
Explain the role of auxins in regulating growth movement in plants.
Differentiate between sexual and asexual reproduction.
Describe the process of meiosis as a type of cell division for gamete formation.

Affective Domain:

Appreciate the significance of movement for survival and adaptation in living organisms.
Show interest in observing and understanding plant responses to environmental stimuli.
Recognise the importance of meiosis in ensuring genetic diversity.

Psychomotor Domain:

Set up simple demonstrations to observe phototropism and geotropism in plants.
Draw and label diagrams of protozoa showing their movement organelles.
Construct a simple diagram illustrating the key stages of meiosis.

Collaborate effectively with peers during practical demonstrations and group discussions.
Participate actively in class discussions, sharing observations and ideas.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Senior Secondary Schools.
State Unified Scheme of Work for Biology (SSS 1).
Modern Biology for Senior Secondary Schools by S.T. Ramalingam.
Biology for Senior Secondary Schools by P.B. Gambo.

Instructional Materials

The teacher will teach this lesson with the aid of:

Seedlings (e.g., bean or maize).
Containers (e.g., small pots, cardboard boxes).
Light source (e.g., torchlight or natural window light).
Charts showing different types of protozoa and their movement organelles (cilia, flagella, pseudopodia).
Diagrams illustrating the process of meiosis.
Worksheets for practice and assessment.

Rationale for the Lesson

This lesson helps pupils understand how living organisms move and respond to their environment, which is essential for their survival and growth. It also introduces them to how organisms reproduce and pass on genetic information, ensuring the continuity of life.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of living things, their characteristics, and simple cell structures from previous lessons.

Lesson Content/Board Summary

MOVEMENT AND REPRODUCTION IN ORGANISMS

Definition and Importance of Movement

Movement is a characteristic of living organisms involving a change in position or place. It can be whole-body movement (locomotion) or internal movement of parts.

The following are reasons why movement is important:

To search for food or water.
To escape from predators or danger.
To find mates for reproduction.
To disperse seeds or spores (in plants).
To respond to environmental stimuli.

Cyclosis in Protozoa

Cyclosis is the streaming or circulation of cytoplasm within a cell. It is a form of internal movement that helps distribute nutrients and organelles.

In protozoa like Amoeba, cyclosis contributes to the formation and movement of pseudopodia.

Organelles for Movement

Different organisms use various structures for movement:

Cilia: Short, hair-like structures that beat rhythmically (e.g., Paramecium).
Flagella: Long, whip-like structures used for propulsion (e.g., Euglena, sperm cells).
Pseudopodia: Temporary cytoplasmic extensions used for creeping movement and feeding (e.g., Amoeba).
Muscles: Contractile tissues found in higher animals for locomotion.

Tropisms (Growth Movements)

Tropism refers to the growth response of a plant part towards or away from an external stimulus. This is a form of movement in plants.

The following are types of tropisms:

Phototropism: Growth response to light. Shoots grow towards light (positive phototropism), while roots are negatively phototropic or insensitive.
Geotropism (Gravitropism): Growth response to gravity. Roots grow downwards (positive geotropism), and shoots grow upwards (negative geotropism).

Auxins and Growth Movement

Auxins are plant hormones that regulate growth, especially cell elongation.

The following are roles of auxins in growth movement:

In phototropism, auxins migrate to the shaded side of the shoot, causing cells there to elongate faster, bending the shoot towards light.
In geotropism, auxins accumulate on the lower side of horizontal roots, inhibiting cell elongation and causing the root to bend downwards. In shoots, auxin accumulation on the lower side promotes cell elongation, causing the shoot to bend upwards.

Types of Reproduction

Reproduction is the biological process by which new individual organisms are produced from their parents.

The following are the two main types of reproduction:

Sexual Reproduction: Involves the fusion of male and female gametes (sex cells) from two parents (or sometimes one parent producing both gametes). It leads to genetic variation.
Asexual Reproduction: Involves a single parent producing offspring that are genetically identical to the parent. It does not involve gamete fusion.

Differences Between Sexual and Asexual Reproduction

The following are differences between sexual and asexual reproduction:

Parents: Sexual involves two parents (usually), asexual involves one parent.
Gametes: Sexual involves gametes, asexual does not.
Fertilisation: Sexual involves fertilisation, asexual does not.
Offspring: Sexual produces varied offspring, asexual produces identical offspring.
Genetic Variation: Sexual leads to high genetic variation, asexual leads to low genetic variation.
Evolution: Sexual promotes faster evolution, asexual promotes slower evolution.

Meiosis

Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. It is essential for sexual reproduction.

The following are key features of meiosis:

It involves two rounds of division (Meiosis I and Meiosis II).
It results in four haploid cells from one diploid cell.
It promotes genetic variation through crossing over and independent assortment of chromosomes.
It ensures that the chromosome number remains constant from generation to generation in sexually reproducing organisms.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction/Questioning
Teacher’s Activity: The teacher greets the pupils and asks them to mention some ways they move. The teacher then asks why movement is important for humans and other animals. The teacher introduces the topic, “Movement,” and explains that plants also exhibit movement, though differently, and that organisms also reproduce.
Pupils’ Activity: Pupils respond to the teacher’s questions, mentioning walking, running, swimming, and stating reasons like finding food or escaping danger. They listen attentively as the teacher introduces the lesson.
Learning Point: Pupils are engaged and their prior knowledge of movement is activated.

Step 2: Definition and Importance of Movement

Time: 5 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines movement and locomotion, explaining the difference. The teacher then discusses the importance of movement for various living organisms, using examples.
Pupils’ Activity: Pupils listen, take notes, and contribute to the discussion by giving examples of movement and its importance.
Learning Point: Pupils understand the definition of movement and its survival value.

Step 3: Cyclosis and Movement Organelles

Time: 7 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher uses charts to show different protozoa (e.g., Amoeba, Paramecium, Euglena) and explains cyclosis in protozoa. The teacher points out and explains the functions of movement organelles like cilia, flagella, and pseudopodia, relating them to the organisms.
Pupils’ Activity: Pupils observe the charts, listen to the explanations, and ask questions for clarification. They identify the different organelles.
Learning Point: Pupils identify and understand the function of various movement organelles and cyclosis.

Step 4: Tropisms and Auxins

Time: 8 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher guides pupils to set up simple demonstrations for phototropism (placing a seedling near a light source) and geotropism (orienting a seedling horizontally). The teacher explains these responses and the role of auxins in regulating them, referring to the board summary.
Pupils’ Activity: Pupils participate in setting up the demonstrations, observe the initial setup, listen to the explanations, and take notes on tropisms and auxins.
Learning Point: Pupils understand plant growth movements (tropisms) and the role of plant hormones (auxins).

Step 5: Types of Reproduction

Time: 7 minutes
Teaching Skill: Discussion/Explanation
Teacher’s Activity: The teacher introduces reproduction as a fundamental characteristic of life. The teacher explains and discusses the two main types: sexual and asexual reproduction, providing examples for each.
Pupils’ Activity: Pupils listen, contribute examples, and differentiate between the two types of reproduction based on the teacher’s explanation.
Learning Point: Pupils identify and understand the basic concepts of sexual and asexual reproduction.

Step 6: Differences & Meiosis

Time: 8 minutes
Teaching Skill: Explanation/Diagrammatic Representation
Teacher’s Activity: The teacher uses diagrams to highlight the key differences between sexual and asexual reproduction. The teacher then introduces meiosis, explaining its definition, purpose (gamete formation), and key outcomes using prepared diagrams.
Pupils’ Activity: Pupils observe the diagrams, listen to the explanations, and note down the differences and the main points about meiosis.
Learning Point: Pupils understand the distinctions between reproductive types and the significance of meiosis.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Define movement and state two of its importance.
Mention three organelles used for movement in simple organisms.
Explain what phototropism is, giving an example.
State two differences between sexual and asexual reproduction.
Describe the main outcome of meiosis.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 1 minute
Teaching Skill: Summarization
Teacher’s Activity: The teacher quickly summarizes the key points of the lesson, reiterating that movement and reproduction are essential life processes. The teacher assigns homework: “Draw a simple