Bio Lab Essay

Submitted By kellyp6
Words: 784
Pages: 4
Open Document
Effect of Salt or Acid on Seed Germination Kelly Perioris SB13U Mr. Rennie Friday April 5, 2013

Hypothesis:
If acid is introduced to the seeds during germination, then the roots will not grow as long as there is no water given.

Background
Why is it important to understand the effects of acid and salt on seed germination? What applications are there for this information? MATERIALS
• Petri dishes
• Paper towel
• Tap water
• pH2
• pH4
• pH6
•
• 100% sea water
•

Methods:
Fold a piece of paper towel and place it in a petri dish. Place 10 seeds in the paper towel. Pour the appropriate solution on the paper towel, as indicated in the table below. Secure the lid with tape and label the petri dish.

Variables:

1. Identify the independent variable(s) in this lab:
2. Identify the controlled variable(s) in this lab

OBSERVATIONS
Yellow Bacteria

Hexant 1 2 3 4 5 6
Household chemical N/A Mouthwash Hand sanitizer Alcohol Bleach Mr. Clean
Smallest Diameter (mm) 0 10 0 0 0 9
Largest Diameter (mm) 0 13 4 4 3 11
Mean Diameter (mm) 0 11.5 2 2 1.5 10

White Bacteria

Hexant 1 2 3 4 5 6
Household chemical Water Mouthwash Hand sanitizer Alcohol Bleach Mr. Clean
Smallest Diameter (mm) 0 14 0 10 9 0
Largest Diameter (mm) 0 27 0 10 20 0
Mean Diameter (mm) 0 20.5 0 10 10.5 0

Replicate 2 0 18.5 0 0 22 0
Replicate 3 0 7.5 7.5 0 30 0
Replicate 4 0 8 0 10.5 14 10
Replicate 5 0 8 0.5 6 16 15
Mean Diameter (mm) of 5 replicates 0 10.5 2 4.125 20.5 6.25

DISCUSSION
1. On the basis of the experimental evidence the bleach was the most effective at inhabiting the growth of bacteria because the mean diameter of all the replicates indicates that it surpasses any other chemical by nearly half making it appear to be the most effective.
2. The purpose of dipping one paper disc in water was to test the effects of water on bacteria and see how the bacteria would react. It was used a control to compare with the chemicals.
3. The purpose of calculating the mean diameter of inhabited growth from 5 different groups was to make sure the results were accurate and that any variables didn’t affect the final results. It gave a more precise final observation. Also the bacteria types from all groups were different so it showed the effects of the chemicals on a wide range of bacterium.
4. Household chemicals such as cleaners containing bleach work on inhabiting growth by the reaction it has with the bacterial cells. It reacts with the molecules and changes them and breaks down the cell wall making the bacteria fall apart. Many household chemicals such as detergents, soaps, hand lotions, disinfectants, window cleaners, surface sprays also carry an ingredient called triclosan that help to inhibit bacteria. This mechanism immobilizes the cell membrane preventing oxygen, nutrients and waste from leaving the cell therefore
Show More

Related Documents: Bio Lab Essay

Essay on bio lab

December 17 2013 Procedure 1. Mark and Recapture method would be the most useful for estimating the population of eagles since eagles are constantly moving so quadrat method would not be ideal here. Also, within a set boundary marking the eagles and recapturing can give us a good ratio of how many eagles are expected in the set area. Mark and recapture are effective for moving organisms. 2. Distribution Patter 1= Clumped as populations are mainly grouped together Distribution Pattern 2- Random-…

Words 710 - Pages 3

Essay on bio lab 20

Jera Majeric Nina Sassano Bio lab 1201 19th of April 2014 Report About Vertebrates Three Classes Aves, Reptilia and Mammalia Chordates are animals with backbones, and it is known that animals with backbones are not only the most complex and complicated groups of animals, but also really highly devolved. They also have interior skeletons and have bilateral symmetry. They have more advanced brains. Organism that belongs to phylum Chordates have to have four features, which include a notochord, there…

Words 1585 - Pages 7

Essay Bio Lab

Enzymes Bio1 1107-12 Spring 2014 Syed H Zaidi \ Due 3/4/14 Lab Partner: Juliet Introduction Enzymes are proteins that are used up to speed up reactions without being consumed by the chemical change. They can be reacted with hydrogen peroxide and you see the reaction take place as soon as the item is dropped in the hydrogen peroxide. In this experiment we tested three different food items and checked to see how they reacted with H2O2. After doing that we got the best reacting…

Words 591 - Pages 3

Bio lab Essay

Beauty of Borobudur Sun Kang Kim 4/28/2014 ARTH 383-001 I had almost no knowledge about any historical or artistic idea of Southeastern Asia before I took this lecture. Fragmentary view of economics, politics, and cultures from TV and other media were only way I could hear and watch. I had strong prejudice that countries from Southeast Asia are just good place for the tourist who never experienced or saw ancient civilization, and Buddhism or Hinduism monuments. I toured…

Words 1193 - Pages 5

BIO lab 1 Essay

LAB 1 1. Describe the function of the following pieces of safety equipment and how each might be used: (10 points) a. Eye Wash (2 points) If chemicals splash into your eye the eye wash station is used to flood the eye with water for 15 to 30 minutes to wash the chemicals out of your eye. b. Fire Blanket (2 points) In case of a small fire a fire blanket can be thrown over the flames to extinguish them, once you have done this immediately leave the vicinity. c. Shower (2 points) In the event…

Words 747 - Pages 3

Ap Bio Lab Report

Be sure to include correctly formatted in-text citations. On a rainy late spring day, fellow biologist Bob finds himself craving cookies while grading lab reports. After finding his way into the kitchen he is astonished to find the normally fully stocked cookie jar empty! There are several cookie eaters in the house (himself included), but only two suspects that would dare eat the precious last cookie Bob had been saving. He quickly obtained DNA samples from in and around the jar with the objective…

Words 1870 - Pages 8

Essay on Bio PH LAB

The effects of concentration gradient on osmosis and diffusion Taylor Kirby Bio 151/Mrs. Eischen ______________________________________________________________________________ Introduction ______________________________________________________________________________ Diffusion is the transfer of molecules back and forth across a membrane, Osmosis is the act of water diffusion. They are important factors in the maintenance of a cells life by allowing the cell to import/export nutrients and water…

Words 593 - Pages 3

Bio Lab Essay example

Risk Analysis, Vol. 29, No. 12, 2009 DOI: 10.1111/j.1539-6924.2009.01324.x Information Processing of Genetically Modified Food Messages Under Different Motives: An Adaptation of the Multiple-Motive Heuristic-Systematic Model Jooyoung Kim1,∗ and Hye-Jin Paek2 Recent risk management research has noted the importance of understanding how the lay public processes and reacts to risk-related information. Guided by the multiple-motive heuristic-systematic model, this study examines (1) how…

Words 9138 - Pages 37

Bio 100 Lab Essay

Maids Maids On A On A Mission Mission Noel Mackey Business Plan May 25th, 2012 Table Of Contents: 1) Mission Statement pg. 3 2) History of Business pg. 3 3) Objectives pg. 3 4) Value Proposition pg. 3-4 5) Financial Plan pg. 4 6) Marketing Plan pg. 5 7) Industry Analysis pg. 6 8) Sales Strategy pg. 6 9) Goals for Year 1, 2, & 5 pg. 6-7 10) Milestones pg. 7 11) Operations Plan pg. 7 12) Executive Summary pg. 8 13) References pg…

Words 2061 - Pages 9

Bio Lab Report Essays

Philip Harper March 7, 2014 Detecting biomolecules Biomolecules are important because they make up/control almost every part of organisms. It is important that our food contains them because they contain proteins, and proteins are a necessity for you to live. I used starch and glucose as assays. If the Benedict’s tests is positive the blue liquid will turn orange, and in a positive iodine test the liquid would turn blue black. It…

Words 428 - Pages 2