BioLab 1 Report

.doc

School

San Juan College *

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Course

2110

Subject

Biology

Date

Jan 9, 2024

Type

doc

Pages

4

Uploaded by CoachWhaleMaster324

Report
N AME : L ATONNE W ILLIAMOSN S CIENTIFIC I NVESTIGATION -L AB R EPORT S HEET Exercise 1 – Questions and Hypothesis Lab Study A – Asking Questions 1) Does watching too much TV cause children to develop learning disabilities? What is the relationship between excessive TV viewing in children and the development of learning disabilities? 2) Should endangered species be cloned to prevent extinction? What are the potential benefits and the risks of using cloning technology to prevent the extinction of endangered species? 3) Does second hand smoke cause disease? What is the association between exposure to secondhand smoke and the risk of developing various diseases? Lab Study B – Developing Hypotheses 1) Does regular interaction with pets improve the health of the elderly? Regular interaction with pets positively impact the health of the elderly, which may lead to improved physical and mental well-being. 2) What effect do high concentrations of the industrial pollutant PCB (polychlorinated biphenyl) have on killer whale reproduction? High concentrations of PCB negatively impact killer whale reproduction, which may lead to decreased fertility rates and lower calf survival. Exercise 2: Designing Experiments to Test Hypotheses
Please use the lab scenario found in Exercise 2 in the Lab 1 Procedure to answer the following questions. Lab Study C. Determining Variables 1) Based on the scenario above determine the dependent variables. Leaf size of the corn plants, size of the corn produced, and the height of the corn plants 2) What is the independent variable in this experiment? The exposure to sulfur dioxide emissions 3) List the controlled variables base d on the scenario above. The type and variety of corn plants The number of corn plants The temperature, humidity, and light The duration of exposure to sulfur dioxide and the filtered air The type of containers used The soil type The watering and fertilization routine for the corn plants Lab Study D. Choosing or designing Procedures 1) What was the level of treatment in the scenario? The exposure of the corn plants to sulfur dioxide emissions from the coal- powered power plant. 2) Describe replication in the above experiment. Replication in this experiment is the process of repeating this experiment multiple times utilizing different groups of corn plants. In this experiment there are four groups of corn plants, with each group consisting of six plants. The process of replication helps to ensure that any of the observed effects are consistent and not due to chance. 3) In the case of the scenario, what was the control treatment? In this experiment the control treatment is the exposure to half of the corn plants that utilized filtered air. This group serves as a baseline to evaluate the effects of sulfur dioxide emissions. By exposing half of the corn plants to filtered air, the observed differences (if any) are measured variables. The two groups they can be attributed to the impacts to the sulfur dioxide emissions.
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