LIFE SCIENCES (GR10) : Cell as a basic unit of life

Introduction

Cells are the basic unit of life, cells are the building blocks of all living things. There are 2 types of cells, plant& animal cell. But we will dwell on animal cell

 

-Just close your eyes and picture a Lego city. What is the building block of that lego city? A single lego of course. Like a lego city, a body is composed of basing building blocks, and those building blocks are the body cells.

The Basic Structural and Functional Unit of Life: The Cell

 

Cell is the smallest unit of a living thing. A living thing, whether made of 1 cell (bacteria) or many cells like human, is called organism. Which is why cells are the basic building blocks of all organism. Several cells of one kind that interconnect with each other and perform a shared function they form a tissue.Several tissues combine to form an organ( stomach,heart or brain). Several organs makes up an organ system (digestive system, circulatory system, or nervous system. All the several systems that functions together form an organism (like human being)

The body has many kinds of cells, each personalised for a specific purpose. Just as a home is made from variety of building material, the body is made from many cell types.

Functions

  • They provide body structure
  • Convert nutrients to energy
  • They contain hereditary materials

 

 

 

Task
  1. Study the two diagrams of plant and animal cells below. 

     

    1. Draw a table of differences between the two cell types in the space provided. Give your table a suitable heading.
    2. Also provide labels for the different cell structures and organelles.

A typical animal cell.

A typical plant cell.

In a 3D cell model, we will be making built models out of materials where we will use other objects to represent the actual parts of the cell.

 

INSTRUCTIONS :

  1. You must create a 3D model of a cell.
  2. You may use whatever materials or 'media' you choose to create your cell.
  3. Your model must clearly show the following: 

     

    • cell membrane
    • nucleus with nuclear membrane
    • cytoplasm
    • mitochondria
    • vacuoles
    • chloroplasts
    • Any other organelles that you might have learnt about

 

 

Requirements for your cell model:

  • Your model and the examples of the organelles need to show some resemblance to the real organelle that we have learnt about so far.
  • Your model needs to be clearly marked with a heading and your name.
  • Each organelle needs to be clearly labelled and with each label you need to add a description of the function of that particular organelle.
  • You also need to make an accompanying drawing (at least the size of an A4 page) including the labels of the structure of a basic plant and animal cell.
  • Your teacher will assess your model according to a rubric
Process

able summarising the differences between plant and animal cells

 

Characteristic

Animal cells

Plant cells

Shape

Have an irregular shape

Have a rigid, regular shape

Cell wall

Do not have a cell wall, only a cell membrane

Have both a cell membrane and a cell wall.

Vacuoles

Have small vacuoles, which are often temporary or absent

Have large vacuoles

Chloroplasts

Do not have chloroplasts

Have chloroplasts to photosynthesise

Evaluation
3D Cell Model Project
  Poor

1 pts

Fair

5 pts

Good

10 pts

Exceeds

15 pts

Cell Structure/Cell Type
 

 

Poor

Model looks like generalized cell. No distinguishing factors of a plant or animal cell.

Fair

Model can not be identified as plant or animal cell, because it has characteristics of both a plant and animal cell.

Good

Model clearly represents a animal or plant cell, with 1 to 2 cell part mistakes.

Exceeds

Model clearly represents a animal or plant cell.

Organelle Function
 

 

Poor

0-5 of cell organelle functions are described and defined clearly and/or poorly described, there are errors when being defined.

Fair

6-9 of cell organelle functions are described and defined clearly.

Good

10-12 cell organelle functions are described and defined clearly.

Exceeds

All cell organelle functions are described and defined clearly.

Cell Details
 

 

Poor

The work is done with poor effort. Cell parts and organelles are not detailed, they look like unformed and/or misshapen making them indistinguishable.

Fair

The work is done with fair effort. Most of the cell parts and organelles are not distinguishable. More detail is needed in order to identify cell parts and organelles.

Good

The work was done with good effort. Most of the cell parts and organelles are distinguishable. Most of the organelles and cell parts are detailed accurately.

Exceeds

The work done exceeds all expectations. The cell parts and organelles are easily distinguishable. All organelles and cell parts and accurately detailed.

Labeled Organelles
 

 

Poor

0-5 of cell organelles labeled and/or errors of labeling and placement of the organelles.

Fair

6-9 of cell organelles are labeled and placed correctly.

Good

10-12 cell organelles are labeled and placed correctly.

Exceeds

All cell organelles are labeled and placed correctly.

Creativity
 

 

Poor

Lacks original artwork. Not students own drawing/writing/crafts. Messy. Lacks color.

Fair

Not very appealing. Limited use of creative materials. Not a lot of color/shapes/design.

Good

Contains students own writing and drawing.Lots of colors, shapes, and appealing design. Shows the student spent time creating an artistic piece.

Exceeds

Eye catching. Great use of colors, texture, shapes. Artwork is the students own & is neat. Writing is easy to read.

Appearance
 

 

Poor

Not in required format and/or submitted late. Pieces/items falling or hanging off.

Fair

Project is damaged, poorly presented. Was possibly submitted later than original due date. Some items possibly falling off.

Good

Project is correct size, clean and neatly displayed. No items falling off. Submitted on due date.

Exceeds

Project is of exceptional quality and presentation. Nothing hanging or falling off. Submitted on time.

NETS/Common Core Standards
NETS Criteria
 

 

Poor

1 to 2 NETS Standards met.

Fair

3 to 4 NETS Standards met.

Good

5 NETS Standards met.

Exceeds

6 NETS Standards met.

Common Core
 

 

Poor

Does not meet Common Core Standards in topic.

Fair

Meets some Common Core Standards in topic.

Good

Meets most Common Core Standards in topic.

Exceeds

Meets all Common Core standards in topic.

Conclusion

In this course you have learnt about the subcellular components of cells and how they are studied. Cells in multicellular organisms, particularly in animals, are specialised to perform different functions; the properties, abundance and distribution of the cytoskeleton and organelles allow, and indeed underpin, this functional and structural diversity. Your study of this course has provided you with a general understanding of cellular architecture and its relationship to different processes in the cell. This sets the scene for further studies in cell biology.

Credits
Teacher Page

Lesson content(notes& questions)

Methodology

&

 Time

LTSM

(Resources)

Teacher

Activities

Learner

Activities

Assessment Method/Strategy

 

INTRODUCTION

 

Cells are the basic unit of life, cells are the building blocks of all living things. There are 2 types of cells, plant& animal cell. But we will dwell on animal cell

 

-Just close your eyes and picture a Lego city. What is the building block of that lego city? A single lego of course. Like a lego city, a body is composed of basing building blocks, and those building blocks are the body cells.

Demonstration for 

 

I will assembly the Legos in a table that is vigilant to all the learners. Then I will form a tree using the legos.

By so doing I will be showing the learners how a cell is actually a building block of life.

 

I will then ask them to take the legos and make a living thing (animal) I will set a timer of 3 mins

Learners will be paying attention while the teacher is explaining to them how the cell is a basic unit of life.Then they will formulate the model of any type of animal using legos.

 

Learners will also ask questions.

 

Practical mini task

 

BODY

Cell is the smallest unit of a living thing. A living thing, whether made of 1 cell (bacteria) or many cells like human, is called organism. Which is why cells are the basic building blocks of all organism. Several cells of one kind that interconnect with each other and perform a shared function they form a tissue.Several tissues combine to form an organ( stomach,heart or brain). Several organs makes up an organ system (digestive system, c irculatory system, or nervous system. All the several systems that functions together form an organism (like human being)

The body has many kinds of cells, each personalised for a specific purpose.Just as a home is made from variety of building material, the body is made from many cell types.

Functions

  • They provide body structure
  • Convert nutrients to energy
  • They contain hereditary materials

 

 

 

Demonstration

 

 

Data projector.

 

Textbook

 

I will go into details explaining, how is the cell the building block of life. I will play a Minnie video for them that shows how a lego city is built. This will help them understand the hierarchy of life.

I will then ask oral question

 

Learners will pay attention and answer the questiong by the show of hands

 

Oral questions

 

 

 

 

 

 

 

 

 

Lesson Application

 

Learners will be given a test to test their knowledge. They will be asked question based on the Hierarchy of life, where they will show the organism is formed. They will also distinguish the animal cell from the plant cell, as they have been thoroughly taught about the animal cell.

 

 

 

Question and answer

 

Worksheet

 

Hand out work sheet

 

Answer the questions on the worksheet and hand them back.

 

 

 

 

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