Planet Earth and Its Environment A 5000-million year Journey

Unit: Patterns in Nature

Biology in Focus, Preliminary CourseGlenda Childrawi and Stephanie HollisOutcomesBy the end of this Module you should be able to:Describe how organisms are make of cells with similar structural characteristicsExplain how cell membranes control the movement of materials into and out of cellsDescribe how differentiated cells preform specialised functions in multicellular organismsExplain how the maintenance of organisms requires growth and repair

OutcomesPrepare microscope slides and use a microscopeInterpret both the view through a microscope and images from electron micrographs Gather, process and analyse information from secondary sourcesPlan and carry out open-ended investigations

Part of the Patterns in Nature ModuleBiology in Focus, Preliminary CourseGlenda Childrawi and Stephanie Hollis

Cells and the cell theoryTopic 1: Introduction to Cells and Cell TheoryDOT POINTOrganisms are made of cells that have similar structural characteristics.

brisbaneinsects.comIntroductionUp until 400 years ago, objects that were to small to be seen with the naked eye could not be examined. The study of living things was popular, but at a macroscopic level (based on what could be viewed with the naked eye).

Before this, living things had not been considered at a cellular level

davidselvam.blogspot.comIntroduction Biologists at the time were called natural scientists suggesting a broad study of nature. Today biologists study living things at a macroscopic and microscopic level and even at a molecular level.

This began with the discovery of the microscope

pballew.blogspot.comCharacteristics of Living Organisms Today most people accept the idea that all living things are made of one or more unites called cells. This is the most basic characteristic of living things and currently termed The Cell Theory

singularityhub.comCharacteristics of Living Organisms The Cell Theory States that:All living things are made of cellsCells are the basic structural and functional unit of organismsAll cells come from pre-existing cells

emc.maricopa.eduCharacteristics of Living Organisms Certain characteristics or life functions are common to all living things. Living things are made of one or more cells and they can:ReproduceGrowMoveRespireExcreteRespond to stimuliObtain nutrientsdie

tweed.nsw.gov.auCharacteristics of Living Organisms Reproduce:Produce offspring that resemble the parents

Grow:Increase in size

ryliesbloger.blogspot.comCharacteristics of Living Organisms Move Even plants can make some small movements such as opening and closing petals

RespireProduce chemical energy by taking in oxygen and combining it with sugar, giving out carbon dioxide as a by-product

botany.orgCharacteristics of Living Organisms ExcreteGet rid of wastes such as carbon dioxide

Respond to Stimuliin the environment, such as moving towards food or growing towards light

poopingpets.comCharacteristics of Living Organisms Obtain nutrientsEAT Duh!! ;)

DieDeath is when all of the above functions cease

mimsies.wordpress.comHomeworkAnswer the following questions in your notebook. Be prepared to discuss next lesson. State the cell theoryBecome familiar with the Timeline: A short history of biology. Handout