Today’s focus lesson will begin when the bell rings!

Focus lesson Question 1 Which of the following pairs incorrectly matches a cell structure with its function? Cell membrane: protein synthesis Nucleus: information (DNA) storage Vacuole: storage Chloroplast: energy conversion

Focus Lesson Question 2 Some viruses attach cells by inserting their own DNA into the host cell’s DNA. Why might it be simpler for the viruses to attack prokaryotic cells than eukaryotic cells? Prokaryotic cells have less DNA than eukaryotic cells. Unlike eukaryotic cells, prokaryotic cells do not have a nucleus. The cell wall in prokaryotic cells is an effective barrier. The rapid growth of prokaryotic cells generate more viruses.

Focus Lesson Question #3 Which type of organic compound is generally not soluble in water and is an important part of cellular membranes? Lipids Proteins Nucleic Acids Carbohydrates

What are we learning? Last Class Today FCIM: Food Web FCIM: questions Pg 50: Energy Flow and Pyramids Pg 51: IP Food Webs and Energy Pyramids Quarter 3 Notebook MAKEUPS DUE FRIDAY! FCIM: questions Page 53: Page Population Dynamics Page 52: Graphing the Kaibab Deer Introduction of station activity Stations

Page 53: Changes in Populations SWBAT: Describe the forces which influence Population.

Changes in a population’s size are determined by: Population Change Changes in a population’s size are determined by: Immigration and Emigration Births and Deaths

Changes in Population Immigration The movement of individuals into a population from another population Immigration = In Emigration The movement of individuals out of a population into another population Emigration = Exit

Practice Page 52 If a large number of buffalo move to a new prairie how is the new prairie’s biodiversity affected? Which process is this a demonstration of? Restate the question in your complete sentence response. WHAT DO YOU THINK BIODIVERSITY MEANS? Explain your answer.

Births and Deaths More births = increase in population More deaths = decrease in population Relate this concept back to over production of offspring

What else can control births and deaths??? Yes, natural selection- but let’s be more specific

Limiting Factors Food and water (resources) for survival Space

Limiting Factors Weather and natural disasters PAGE 52: Are these factors abiotic (nonliving) or biotic (living)?

Practice Page 52 A these limiting factors biotic or abiotic? Decode these words- what do they mean? Restate the question in your complete sentence response. Explain your answer.

Types of Population Growth Exponential Growth Resources are so abundant that a population increases dramatically Very rare Usually occurs when population moves into uninhabited area Logistical growth Population grows until it stops growth because of limited resources When a population stops growing because of limited resources the environment has reached its carrying capacity. When the European rabbit was introduced to Australia in 1859 the population started at 24 rabbits (brought over by some guy who wanted them as pets/livestock) Today there are between 200-300 million rabbits Field mouse: What kind of limiting factors affect the population of a field mouse?

Carrying Capacity Carrying Capacity: the maximum # of individuals of a particular species that the environment can normally and consistently support The level of carrying capacity depends on the availability of limiting factors Limiting factors: Competition for food and water (resources) Space Weather/natural disasters

Practice Page 52 Question 1 In 1 sentence: describe how the immigration of rabbits would affect this ecosystem: Question 1

Practice Page 52 The Kaibab deer were on the verge of extinction when President Roosevelt banned hunting in 1907. The Forrest service even went as far as killing off nearly 8,000 of their natural predators. Graph the following information at the bottom of the page: Pay attention to what the Dependent and Independent variables are. Analyze With all of the protection there was STILL a drastic drop in deer population from 1920 to 1924. Explain WHY this change in population may have occurred.

What do we need to know for the EOC which is 12 class periods away! Recognize the consequences of the losses of biodiversity due to catastrophic events, climate changes, human activity, and the introduction of invasive, nonnative species.

Station activities: hand out= 1st grade Q4 Expectations: Volume level 1-2 Work diligently= like your EOC is in 12 class periods! No more than 3 per group Directions: Select one activity from each column and each row- see my example. Before moving to the lab area determine your plan of action! You may work in any order! Example= approximate times 1 2 3 A= 15 min x B= 25 min C= 40 min X