Biology-The study of life : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 1 Biology-The study of life Cell-The basic unit of life Copyright 1996-2001 © Dale Carnegie & Associates, Inc.
Cell and its structure : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 2 Cell and its structure Cells are the starter point. All living organisms on Earth are divided in pieces called cells. There are smaller pieces to cells that incude micro and macro molecules and organelles.
Cell theory-cell is a basic unit of life : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 3 Cell theory-cell is a basic unit of life Cells are small compartments that hold all of the biological equipment necessary to keep an organism alive and successful on Earth. A main purpose of a cell is to organize. Cells hold a variety of pieces and each cell has a different set of functions. It is easier for an organism to grow and survive when cells are present. If you were only made of one cell, you would only be able to grow to a certain size. You don't find single cells that are as large as a cow. Also, if you were only one cell you couldn't have a nervous system, no muscles for movement, and using the internet would be out of the question. The trillions of cells in your body make your life possible.
According to R. virchow in 1958 ,all living cell arise from pre-existing living cells.
‘omnis cellula e cellula’
Basic features of being alive : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 4 Basic features of being alive Protoplasm
Cellular organization
Movements
Genetic continuity
Life comes from pre-existing life
Growth and development
Metabolism
Reproduction
Death
Healing
Phases of life
Struggle and survival
Co-ordination
Excretion
Response to stimulus
Types of cell : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 5 Types of cell There are various types of cell .In biology we usually come across the word animal and plant cell. But we should differentiate the cells on the basis of their nucleus first.
Prokaryotic cells vs eukaryotic cells
Prokaryotic Cells(proh KAYR ee yah tihk) : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 6 Prokaryotic Cells(proh KAYR ee yah tihk) cells without membrane-bound structures
EX: bacteria
pond scum
Slide 7 : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 7
Eukaryotic Cells(yew KAYR ee yah tihk) : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 8 Eukaryotic Cells(yew KAYR ee yah tihk) cells with membrane-bound structures
EX: animals, plants, fungi and protists
Primitive cell : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 9 Primitive cell
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COMMON CELL TRAITS : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 11 COMMON CELL TRAITS A cell is the smallest unit that is capable of performing life functions.
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CELL THEORY : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 14 CELL THEORY A theory resulting from many scientists’ observations & conclusions
COMPARING CELLS : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 15 COMPARING CELLS The size & shape of a cell relates to its function. (job it does)
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CELL THEORY 1. The basic unit of life is the cell. (Hooke) : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 17 CELL THEORY 1. The basic unit of life is the cell. (Hooke) In 1665, an English scientist named Robert Hooke made an improved microscope and viewed thin slices of cork viewing plant cell walls
Hooke named what he saw "cells"
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CELL THEORY 2. All living things are made of 1 or more cells. : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 19 CELL THEORY 2. All living things are made of 1 or more cells. Matthias Schleiden (botanist studying plants)
Theodore Schwann (zoologist studying animals) stated that all living things were made of cells Schleiden Schwann
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CELL THEORY 3. All cells divide & come from old cells. (Virchow) : 6/2/2009 common features of life,cell as a basic unit of life,cell theories ......... 21 CELL THEORY 3. All cells divide & come from old cells. (Virchow) Virchow