2 Objective: You will be able to differentiate between living and nonliving things. Do Now:Read the introduction on top of page 16Define biology
3 Characteristics of living things Made up of cell(s)Grow and developReproduceObtain and use energy and materialsRespond to the environmentMaintain a stable internal environmentBased on a genetic codeAs a group, change over time
7 Objective: You will be able to identify cells using a compound light microscope. Do Now:Read “Made up of cells” on p. 17How many different cells are found in the human body?
8 Living things and cells All living things are made up of one or more cellsCells are the functional unit of living thingsSome organisms have only one cell and are called unicellularSome are even made up of trillions of cells
11 Living things grow and develop Unicellular creatures simply increase their cell sizeMulticellular organisms go through growth called developmentDevelopment begins with a fertilized egg that divides into different types of cellsThis is called differentiation because it makes different types of cells
12 Objective: You will be able to explain how reproduction can create offspring that are similar and different.Do Now:Read “Reproduction” on p. 17Differentiate between sexual and asexual reproduction
13 Reproduction Is the creation of a new individual Can be done by: Sexual reproductionAsexual reproduction
15 Types of reproductionSexual involves cells from two different parents combiningOffspring are not exactly like either parentAsexual involves one parent creating offspringOffspring are usually identical to parent
16 Based on a genetic codeExplains how offspring inherit traits from parentsTraits are characteristics passed from one generation to the nextDNA is a molecule that carries the traits from parent to offspringIt is called the hereditary material
20 Paired Activity View several hydra under the microscope Draw a hydra and label the parent and the offspringWrite a sentence that compares the offspring to the parentHow does the hydra know how to make another hydra and not a monkey?
21 Objective: You will be able to explain the reason why organisms must consume food. Do Now:Read “Need for material and energy” on p. 18List the reasons that organisms need materials and energy
22 Obtain and use materials and energy Food is energyOrganisms take in material for energySome organisms eat (heterotrophs)Some take in water and carbon dioxide to make their own food (autotrophs)They use this energy to do chemical reactions to stay alive and growAll of the chemical reactions involving energy to keep organisms alive is called metabolism
25 Paired activityYou will be given nutritional facts about McDonalds and SubwayChoose a typical meal you would have at each placeCompare your choices with the daily recommended diet (below)Compare fats, protein, carbohydrates and caloriesChoose 1 complete meal from each restaurant that would not exceed the daily recommended diet.
26 Response to the environment Organisms detect and respond to stimuliA stimulus is a signal which causes an organism to respondEx. Bright light, predatorThese are examples of external stimuliA stimulus can also be internalEx. Too much CO2 in bloodOrganisms must respond to the environment to maintain homeostasis
27 Maintain a stable internal environment Even with changing external environment, most organisms must keep internal conditions stableExamples:Body temperatureBlood sugar levels
29 Objective: You will be able to explain how favorable traits increase in a population. Do Now:Read “Evolution” on p. 20Why can’t individuals evolve?
30 Organisms change over time Individuals don’t change over time but groups do changeThis change over time is called evolutionOver thousands of years, these changes can become significantExplains the diversity of life
32 AdaptationsFavorable traits that allow the organism to survive is called an adaptationQuestionWhat would happen if an individual was born with a new adaptation?Favorable traits (adaptations) increase in a population over time.Continues to increase until all individuals have itSo overall, all of the organisms did change
33 What do you know? List 3 things you already know about evolution List 2 things you know about human evolutionThere are no right or wrong answers.
34 Objective: You will be able to list the levels of organization of life. Do Now:Read “Branches in Biology” on p. 20
35 Organization levels Biologists break life down into different levels This make sit easier to study lifeThe order from smallest to largestCells, tissues, organs, organ systems and organism
39 Organ systems are made of organs that work together
40 Organism is made of a group of organ systems working together
41 Paired Activity Chose one of the tissue slides Locate a cell of that tissue under high powerDraw the cell and list what tissue it came fromRepeat this until you have viewed four different tissue slides