Biology of the Cell

Intro to Bio online

Molecules and Cells

General Chemistry I

Introduction to Chemistry

Table I: Day P. caudatum alone, cells/mL P. aurelia alone, cells/mL P. caudatum mixed, cells/mL P. aurelia mixed, cells/mL 0 2 2 2 2 2 10 10 14 10 4 23 50 34 22 6 48 80 40 62 8 52 86 44 65 10 60 90 60 70 12 68 100 64 72 14 80 106 68 74 16 86 120 70 80 Post-laboratory Questions: 1. Paramecia possess: a. A nucleus b. Flagella c. A contractile vacuole d. A and C e. All of the above 2. The organisms used in this experiment belong to which domain of life? a. Bacteria b. Archaea c. Eukarya 3. What served as the food for the paramecia in this experiment? a. Rice b. Oats c. Bacteria d. Nothing, they are photosynthetic 4. Which of the following can influence the carrying capacity of a popumlation? a. Availability of food b. Availability of water c. Competition d. Build up of toxins e. All of the above 5. Which type of competition would be observed between organisms within the P. caudatum culture? a. Interspecific b. Intraspecific c. There would be no competition, they are of the same species 6. Which culture reached its carrying capacity the fastest in this experiment? a. P. caudatum , alone b. P. aurelia , alone c. P. aurelia , mixed 7. You have counted 30 organisms in your culture on Day 4. The concentration of organisms in this culture is: a. 15 cells/mL b. 30 cells/mL c. 60 cells/mL d. 90 cells/mL 8. Based upon your data, which culture experienced the greatest rate of exponential growth? a. P. caudatum, alone b. P. aurelia , alone c. P. caudatum , mixed d. P. aurelia , alone 9. Based upon the data, which organism appeared more efficient at using its resources? a. P. caudatum b. P. aurelia 10. In a repeat of this experiment, you found that on Days 10-16 the number of individuals in the P. caudatum , mixed culture began to gradually rise. A possible explanation for this is: a. There was insufficient food in the culture b. The temperature warmed enough to allow for more growth c. A genetic variant of the original population began to experience growth due to its use of a different food (bacterium) source d. None of the above could lead to this scenario Journal Questions 1. Make a hypothesis about how you think the two species of Paramecium will grow alone and how they will grow when they are grown together. I think the paramecium will grow better in two separate environments then being in the same environment. 2. Explain how you tested your hypothesis. The paramecium’s were put into 3 test tube the first to test tubes were filled one paramecium in each and the third the paramecium’s were mixed together. They were monitored for 16 days and their growth was recorded. 3. On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know? 4. On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know? Day 4. On Day 4 P. aurelia was at a 50 and had surpassed its competition who was still at a 23. 5. Explain the differences in the population growth patterns of the two Paramecium species. What does this tell you about how Paramecium aurelia uses available resources? Paramecium auerlia grew at the at a faster rate than Paramecium caudatum . The environment was not sufficient enough to support them both. 6. Describe what happened when the Paramecium populations were mixed in the same test tube. Do the results support the principle of competitive exclusion? When the paramecium were mixed into the the same test tube one paramecium out grew the other and would not be able to survive in the same environments. The results do. Support the principle of competitive exclusion. 7. Explain how this experiment demonstrates that no two species can occupy the same niche. One species will out grow the other because the will be in competition with each other.

BIO | 111 | Intro to Bio online | lab | Table I: Day P. caudatum alone

Module 4 Lesson 1: Ionic and Metallic Bonding Essential Standards Addressed: 1.2.1 (Partial); 1.2.2 (Partial); 1.2.4 (Partial); 1.2.5 (Partial) Slide 6: What are valence electrons, and how do I determine the number of valence electrons in an element? Valence electrons are the electrons in the outer shell and are involved in bonding. The number of valence electrons can be determined by the group number. EX Group 1 has 1 valence electron, while group 2 has two valence electrons. The noble gasses have 8 electrons. Slide 8 : What is a Lewis Dot Diagram, and how do I draw one? Lewis Dot Diagrams are a visual interpretation of the number of valence electrons in an atom or ion. Each dot in a Lewis Dot Diagram is used to represent a valence electron, and are placed around the symbol of the element. Electrons do not pair until they are forced to and this is shown in Lewis Dot Diagrams because each electron will be drawn on different sides of the atomic symbol until there are too many and they are forced to combine into pairs. Draw the Lewis Dot Diagram for Mg and F below. I don’t know how to do that on a google doc but Mg would have two valence electrons because it is in group 12. They would be drawn on either side of the Mg. F would have seven valence electrons, all drawn in groups of two except for one side. Slide 11 : How do I use the Periodic Table to determine the charge of an element? The periodic table can be used to determine the charge of an element, whether negative or positive. This can be done simply by counting the number of spaces in between the desired element and the nearest noble gas. If the nearest noble gas is behind the desired element, the charge will be positive while if the element is counted forward, the charge will be negative. Slide 12 : What do metals tend to do with electrons? What are the resulting ions called? Metals tend to lose electrons from their outer energy level, changing them into a cation. The resulting ions still have the original element name in them, but also adds the word ‘ion’ onto the end of the word. For example, if sodium became a cation, it would be called a sodium ion. Slide 13 : What do nonmetals tend to do with electrons? What are the resulting ions called? In contrast to metals, nonmetals tend to gain electrons. The names of the resulting ions for nonmetals are slightly more complicated than metals but follow the same basic principles in their formulation. The first syllable is the root and beginning of the word, followed by the letters

CHM | 130 | Introduction to Chemistry | study guides | Module 4 Lesson 1: Ionic and M

2018 Extension: Cell populations Get the Gizmo ready :  Click Reset .  Select the GRAPH tab.  Set the Cycle Length to 5 hours. Question: How quickly do cells multiply? 1. Collect data : Click Play to start a new simulation. Click Pause when the maximum number of cells is reached. View the total number of cells on the GRAPH tab. (Click the “–” button until the whole graph is visible.) Draw a sketch of this graph here. What is the general shape of the graph? The graph stays steady at first then goes higher 2. Analyze : Look closely at the graph. A. About how long did it take to grow the first 20 cells? 27hr B. About how long did it take to grow the last 20 cells? 2-3 hrs C. Would you say the rate of cell growth is increasing or decreasing? Explain. The rate of the cell growth is increasing and it takes about 20 hours to grow 10 ells. It only takes 2-3hrs to grow the last 20 cells 3. Extend your thinking : In living organisms, the cell cycle is closely regulated. What do you think will happen if cell division is not controlled? If the cell division is not controlled it may develop into some new kinds of disease which people can’t control

BIO | 110 | Molecules and Cells | lecture notes | 2018 Extension: Cell populatio

Results Table Scienﬁc name Classiﬁcaon group Habitat Nutrion Locomoon Organism A Euglena Plant like prost Surface of muddy soil or stagnant pond makes it own food Whip like ﬂagellum Organism B Penicillium Animal like prost Organism C Volvox volox Plantlike prosts freshwater Makes its own food Flagella Organism D Dictyostellium Slime mold Fungus Moist cool shady ﬁve Bacteria and decaying organic matrial pseudopods Organism E Rhizopus Bread mold Fungus Old bread pieces of fruit Dead or deaying organic maer Does not move Scienﬁc name Classiﬁcaon habitat Nutrion Locomoon group Organism F Saccharomyces Yeast Fungus Sugary, warm and moist environments Sugar Does not move Organism G Spirogyra Filamentous alga Plant like prost Fresh water Makes its own food Does not move Organism H Amoeba Plant like prost Fresh water Phagocytosis pseudopods Organism I Paramecium Protozoans Plant like prosts Chloroplasts Parcles of organic maer Cilla Quesons 1. Diﬀerent types of prosts move in diﬀerent ways. Describe how one of the prosts you observed moves. Amoeba move through their pseudopods. 2. Why are so many other living things dependent on plant-like prosts? a. Many living things don’t make their own food so they depend on the plant and plant like prosts to survive 3. Which organisms could not move? Why? a. Organism F b. Organism E 4. Which of the prosts you observed had both plant-like and animal-like characteriscs? Describe. 5. Explain why algae are plant-like. Algae rely on photosynthesis for food which is a characterisc of only plants 6. Locomoon is generally a characterisc of animals. However, some plant-like prosts move about by means of ﬂagella. What is the adapve advantage of a photosynthec organism that is able to move from place to place? 7. How do the fungi you idenﬁed obtain food? They rely on dead and decaying organic material. 8. How are fungi important to the environment? The environment is very important because they grow in dark moist environments . 9. If an imperfect fungus were found to produce spores in sexual reproducon, what would you need to look at to reclassify the fungus? a. The Eukaryoc Supergroups

BIO | 111 | Intro to Bio online | lab | Results Table Scienﬁc name Cl

Module 4 Lesson 4 Guided Notes (Covalent naming and Writing formulas) Essential Standards Addressed: 1.2.4 Slide 2 1. Which element is written first? The trend for which element written first goes to the farthest left and the farthest down. 2. What types of prefixes are used to describe the number of atoms? Greek prefixes are used to describe the number of atoms. 3. What do all of the names for covalent molecules end with? All covalent molecules end with Ide 4. Which prefix is never used with the first element? Mono is never used with the first element Slide 3 5. What is the prefix for 2? Di is the prefix for 2 6. What is the prefix for 6? Hexa is the prefix for 6 7. What is the prefix for 10? Deca is the prefix for 10

Schools|Wilson Community College

Departments in Wilson Community College

BIO

BIO

CHM

CHM

Popular courses from Wilson Community College

Popular documents from Wilson Community College