Essay on Mark Biology and Population Growth Rate - 890 Words

BIOL 1209 Writing Assignment 2 Cover Sheet I certify that the writing in this assignment is my individual work and is my sole intellectual property. It does not contain the ideas, or writing of other individuals/authors. Author: Mark Cooper Jr. Date: 10/24/12 Lab Instructor: Katherine Hovanes Lab Section # 12 Population Ecology Experiment Background: Phosphate is an abiotic factor; therefore, it is a nonliving factor that affects living organism. In this experiment we prose to test the whether variation in environmental phosphate levels affects autotrophic organisms. We ran a lake and Chlamydomonas experiment in order to determine a solution for this question. In our lake experiment we took samples of water†¦show more content†¦Lake Experiment (Ecosystem): Phosphorus Factor Null: Phosphate levels will not influence the abundance of aquatic autotrophic organisms in the lakes. Alternative: Phosphate levels will influence the abundance of aquatic autotrophic organisms in the lakes. Prediction: High levels of phosphate will cause an increase in the abundance of aquatic autotrophic organisms in the lakes. Results: Figure.1: The graphed data represents the growth rate of algae cells (population sizes million cells/mL) in each treatment over 21 day time period. We graphed the population sizes of the control, no-phosphorus, and high-phosphorus treatment. The control group contained 1 ml of Chlamydomonas and 4 ml of phosphate. The no-phosphorus group contained 0.5 ml of Chlamydomonas and 4.5 ml of phosphate . The high-phosphorus treatment contained 3 ml of Chlamydomonas and 2 ml of phosphate. Trend: there is no specific trend represented in the graph. However, No-Phosphorus contained the highest population growth rate with a slope of .19953. The Control and High-Phosphorus treatments had a similar growth rates. However, the Control treatment was higher than the High-Phosphorus treatment. The Control treatment possessed a slope of .1535, and the High-Phosphorus treatment slope of .1407 for. Figure2: The dataShow MoreRelatedLab Report : Lighting Up With Tetrahymena. Katy Snider. Texas State University1361 Words   |  6 Pages Lighting Up with Tetrahymena Katy Snider Texas State University Abstract Tetrahymena cells are model organisms that have led to the discovery of many groundbreaking topics in the biology world. Tetrahymena cells nourish through a process called phagocytosis. Phagocytosis is when the cell engulfs anything in its path using the cell’s cytoplasm. In this experiment, through the use of a control, and low and high concentration of tobacco extract it was determined that cigarette extract inhibitsRead MoreEssay On Glioblastoma1349 Words   |  6 PagesGlioblastoma(GB) is the most common primary malignant solid brain tumor in adults1. 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