Ap Biology Lab Report

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READ THIS LAB BEFORE COMING TO CLASS. Introduction: In this lab exercise we will study the effects of an abiotic (non-living) factor on seed germination (the beginning of seed growth which is usually seen with emergence of a small white root). We will also be stressing the use of graphing skills. We will use a common seed available in grocery stores, red kidney beans. These plants do not live near the sea normally. Many plants cannot live in soil with high salt content. Salt is called an abiotic factor because it is a non-living factor. Salinity lowers their ability to absorb water and they die. We will experiment to see if beans can be grown in a soil with varying levels of salinity (salt). In real life, sea spray often affects the ability…show more content…
This is important in communities near the ocean. In this lab we will also be reinforcing scientific method skills. This is covered in Section 1.2 of your text and page 19 for summary. You may need to review concepts like hypothesis, observation, conclusion, experimental design, controlled experiment (control and experimental groups), independent variable and dependent variable. We will also look at your ability to gather data and reporting on data. The use of a graph (almost always a line graph) will generally be required and you will need to remember how to do these. Graphs will be on all exams and many tests so learn it NOW!!! Observation: Kidney beans do not grow well in soil with salt content. Question: How do different salinities affect a seeds ability to germinate? 2 pt Hypothesis: I hypothesize that the seeds in a lower salinity will germinate more. 2 points Prediction: If seeds are place in a bag with a lower salinity, then they are going to germinate more than those in a higher salinity solution. 2 points Materials: • • 60 red kidney beans solutions of 0.0% salt (tap water), 0.20% salt, 0.6.0% salt, 1.0% salt, 1.5% salt 5 paper napkins New package • • 5 plastic baggies with holes cut in them for

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