Free Essay

Bio Lab

In: Science

Submitted By ulala
Words 778
Pages 4
Q1. What is the carrying capacity for moose in the simulation model of Isle Royale, prior to any changes in the weather?
Carrying capacity of moose is the maximum number of individuals of that species that the local environment can support at that particular time and weather. The graph for this is explained as it increases and then levels out. The moose first increased in population when introduced to the island and then the population growth became stable.
1000
Q2. Based on your data, if you added 500 moose to the Isle Royale population in the simulation, without any wolves present and with a normal growing season, and then you waited 50 years, the moose population size would be approximately: 600
Q3. When the wolves arrived on Isle Royale, what did they find?

A small population of well-fed moose
A small population of underfed moose
A large population of well-fed moose
A large population of underfed moose
Q4. Based on what you've learned in this lab by investigating moose and wolf population cycles, which graph above best represents a predator-prey system, and which curve describes dynamics for the predator species?

The graph on the left is the best representation, and the predator's curve is blue.
The graph on the left is the best representation, and the predator's curve is red.
The graph on the right is the best representation, and the predator's curve is blue.
The graph on the right is the best representation, and the predator's curve is red.
Q5. What does the carrying capacity for moose on the island primarily depend on?

The number of moose
The number of wolves
The rate of plant growth
All of the above
Q6. How does the average fat stores for moose when there are no wolves on Isle Royale compare to average fat stores when there are many wolves?

When there are many wolves, average fat stores is lower.
When there are many wolves, average fat stores is higher.
Average fat stores is not related to wolf presence.
It depends on how many wolves were initially introduced.
Q7. How will the population of birds change over the first few years?

The population will grow steadily, gaining a constant number of birds each year.
The population will grow more and more rapidly with each passing year.
The population will grow steadily for a few years and then shrink steadily back to zero.
The population's growth in the first few years will depend on the size of the city.
Q8. Imagine that after the birds have been living in the city for many years a second, big flock of birds arrives. How do you think the bird population will grow (or shrink) in the 10 to 20 years after the extra birds arrive? Choose the graph that best represents how you expect the city's bird population to change over time in this scenario.
Stable, sharp spike, and then return to previous stable.
Q9. Wolves were hunted to extinction about a century ago in the eastern U.S. and Canada. Recently, wild wolves have made a return to eastern Canada. Wolves eat deer in this area, which otherwise have few natural predators. Based on your results in this lab, which is the best prediction for how the deer population will be affected by the return of wolves?

Wolf predation will lead to a smaller population of healthier deer, because more resources will be available for each surviving deer.
Wolf predation will lead to a smaller population of less healthy deer, because deer will waste time and energy avoiding wolves.
Wolf predation will lead to a smaller population of deer that have about the same level of health as before, because wolves will lower the carrying capacity for deer.
Wolf predation will lead to a larger population of healthier deer, because wolves prey on the less healthy deer, al
Q10. Which of the following is the best explanation for why extinctions are more likely with longer growing seasons in this simulation of Isle Royale?

With more plants available:

moose are healthier on average and can avoid wolves, leading to extinction of the wolves. moose no longer have a carrying capacity, so their population cycles are much more variable, and therefore their population size is more likely to hit zero (extinction) by chance. there is not enough room for moose to move around the island looking for food, leading to extinction of the moose and then the wolves. moose and then wolf populations grow larger during cycle peaks. If there are enough wolves, they eat all the moose, leading to extinction of both species. lowing the deer population to thrive.…...

Similar Documents

Free Essay

Bio 101 Evolution Lab

...Evolution Lab BIO/101 Pooja Thakur 7-23-12 Evolution Resulting From Natural Selection INTRODUCTION The Evolution Lab simulates environmental situations to determine effects on evolution over periods of time. This lab experiments with the evolution of finches on two different islands over 100, 200, and 300 years. By manipulating parameters that influence natural selection, the effects that natural selection have on the evolution process can be studied. HYPOTHESES • The size of the island will influence the population. • The amount of precipitation will influence beak size. • Variances in beak size will influence beak size. MATERIALS The materials needed for this experiment consist of a computer and access to the Evolution Lab on the University of Phoenix student website. In the Evolution Lab there are two islands, Darwin Island and Wallace Island. There are seven variables that can be changed to run many different experiments on both islands. The variables are beak size, variance of beak size, heritability, clutch size, island size, population, and precipitation. METHODS In all of the experiments Darwin Island was used as the control group and Wallace Island was the experimental group. So, in each test, the variables for Wallace Island were altered and the variables for Darwin Island were left alone. The first experiment was to determine whether or not the size of the island affected the population. To do this, the only variable......

Words: 892 - Pages: 4

Premium Essay

Bio 100 L Labs Concepts

...BIO 100L Concepts- Labs and concepts week 7 Conservation Readings * Read chapter 34 (focus on 34.1, 34.4), 36 (focus on 36.4, 36.5) in the textbook. * Review recent information on climate change at this website http://www.epa.gov/climatechange/science/stateofknowledge.html Introduction The current state of the biosphere shows unsettling trends. There is a need to meet these challenges, pursue more knowledge, and work as individuals and as a society toward long-term sustainability. Recent research has sent a message that global warming may not be a hypothetical threat, but a current issue warranting immediate action (Krogh, 2009). Global Warming There is a steady rise in carbon dioxide in the atmosphere. It is estimated that the average carbon dioxide concentration in the atmosphere has increased approximately 17% in the past 45 years (Campbell, Reece, & Simon, 2007). It is estimated that 20% of the excess carbon dioxide released into the atmosphere can be attributed to the burning of trees after deforestation. The burning of fossil fuel accounts for another 70-80% of carbon dioxide released into the atmosphere. Global temperatures are concurrently on the rise. Carbon dioxide lets radiation through the atmosphere, but retains some of the heat it generates (greenhouse effect). When carbon dioxide increases in the atmosphere, this greenhouse effect is enhanced, and too much heat from the sun is retained in the atmosphere. Some scientists, therefore,......

Words: 2951 - Pages: 12

Premium Essay

Lab 1 Bio 101

...Helena Clay Williams Helena Clay Williams UMUC Biology 102/103 Lab 1: Introduction to Science INSTRUCTIONS: * On your own and without assistance, complete this Lab 1 Answer Form electronically and submit it via the Assignments Folder by the date listed on your Course Schedule (under Syllabus). * To conduct your laboratory exercises, use the Laboratory Manual that is available in the WebTycho classroom (Reserved Reading or provided by your instructor) or at the eScience Labs Student Portal. Laboratory exercises on your CD may not be updated. * Save your Lab 1 Answer Form in the following format: LastName_Lab1 (e.g., Smith_Lab1). * You should submit your document in a Word (.doc or .docx) or Rich Text Format (.rtf) for best compatibility. Exercise 1: Data Interpretation Table 1: Water Quality vs. Fish Population Dissolved Oxygen (ppm) | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | Number of Fish Observed | 0 | 1 | 3 | 10 | 12 | 13 | 15 | 10 | 12 | 13 | (hint: ppm stands for “parts per million”) 1. What patterns do you observe based on the information in Table 1? Ans. The quality of fish increase as (ppm) increase to a point while the quality of water continue to increase 2. Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water. Ans: If oxygen or ppm in the water increase more fish will be produce 3. What would your experimental approach......

Words: 1241 - Pages: 5

Premium Essay

Bio Lab Report

...Tuong Nguyen Professor Eneigho Bio 42 11 March 2014 Bio Lab Report #3 For Lab on Thursday Feb 28 Procedure 24.1 Question 2: What is the shape and size of each bacteria colony? * Shape: circular, irregular, filamentous, rhizoid * Size: The size of the colony can be a useful characteristic for identification. The diameter of a representative colony may be measured. Tiny colonies are referred to as punctiform. Procedure 24.8 Question 6: Do all cells of a trichome of Cillatoria appear similar? Yes Question 7: a. Do adjacent cells share a common sheath? Yes b. What do you suppose is the function of the sheath? To protect and to keep the colony together c. Do clusters of Gloeocapsa represent multicellular organism? Why or why not. No, because you can break down the cells without killing them d. What is the best stain for Gloeocapsa, India ink or methylene blue? Methylene blue Question 8: a. How is the shape of Merismopedia different from other cyanobacteria you studied in this exercise? Merismopedia is a flat, square colony one cell thick b. How would a colony attain this shape? Equal divisions in two planes Procedure 24.6 Question 4: a. Where are the bacteria? Are they between cells or inside cells? Inside the cells b. Why is this relationship between a plant and bacterium called a mutualism? Mutualism is any relationship between individuals of different species where both individuals benefit. For some plants their......

Words: 339 - Pages: 2

Free Essay

Bio Lab

...6.Distilled water sample is necessary in procedures A and B because it is used as a control sample. Distilled water is used as a control because its purified. Its devoid of contaminants. Controls are needed so you can see what the results would be of an experiment. Positive controls tell you what the positive result of your unknown would be, and negative controls show you what the negative result of your unknown would be when added with Benedict's solution or the Iodine solution. Without the controls, you wouldn't know. Lipids 1.Fat molecules are made up of a molecule of glycerol and three molecules of fatty acids. Each fatty acid consists of a hydrocarbon chain with a carboxyl group at one end. The glycerol molecule has three hydroxyl groups, each label to interact with the carboxyl group of a fatty acid. Removal of a water molecule at each of these three positions form a triglyceride. 2.Fats, oils and waxes are all lipids. Fats and oils are made from glycerol and three fatty acids joined by dehydration synthesis. (also known as triglycerides). Naturally occurring esters of long chain carboxylic acids with long chain alcohols are waxes. Waxes are low melting point solids. 3.A diet including large quantities of saturated fatty acids should be avoided because saturated fatty acids are a major risk factor for heart attacks and strokes. Diets high in saturated fatty acids lead to an increase in the production of cholesterol. They also lead to health problems......

Words: 322 - Pages: 2

Premium Essay

Bios 140 Lab

...used in light microscopy | 2 | Structure found in plant cells: Cell ____ | 3 | Location where digestive enzymes are found | 7 | Cell type which does not have a nucleus | 4 | Microscope used to view ribosomes found in the inside of a cell | 8 | Trees are found in this kingdom | 5 | Opening in microscope stage that allows light to reach viewer | 11 | Straight hollow tube of protein | 6 | Used as channel to allow transport of molecules in and out of nucleus | 12 | Site of cellular respiration in eukaryotic cells | 9 | Cell type which has membrane-bound organelles | 14 | Ribosomes are found on the ____ ER | 10 | Mounting medium used in microscope lab | 16 | Uncondensed chromosome | 13 | Found in eukaryotic cells | 18 | Used as platform to view specimen | 15 | Eyepiece of microscope | 19 | Cells used in Microscope Lab | 17 | Microscope focus knob used to see details |...

Words: 304 - Pages: 2

Premium Essay

Bio Mystery Powder Lab

...Bio 120 Date 2-24-14 Scientific Method Lab Objective – For this lab, our objective was to identify the five mystery powders given to us which we were similar in appearance and to check their solubility and reactivity with water, vinegar and iodine. The objective was also to record information as accurate as possible and also to make observations in the reactions of five mystery powders with water, vinegar and iodine. Hypothesis- if we are using all the household mystery powders them they should all dissolve in water because I think all the household powders are soluble in water. Background information- we were given five different mystery household powders. So, as being different powders their physical and chemical properties will also be different such as some of them will react to water, some will react to vinegar and some to iodine. 1. To ensure that the data is correct all of us the group members did our recordings whatever we saw or observe and then checked it with all of the group members. 2. We also did all the tests one by one first with water, second with vinegar and then with iodine. I thought that if sodium bicarbonate reacts with vinegar then it will also react with iodine which wasn’t true. It reacted only with vinegar. 3. From our observations we used solubility and litmus paper to distinguish one [powder from another. 4. For most of this lab we used qualitative observations because at first before even starting the lab we looked at the unknown......

Words: 1312 - Pages: 6

Free Essay

Bio Lab #6

...Question 3 a). The needles are arranged vertically pointed up, outwards, and are stuck close to one another; attached in clusters. b). In a bundle, there are two leaves in a bundle. c). Pine leaves have needles, instead of flat leaves, like the broad-leaved trees. The needles help to survive winter’s hardship. For example, the needles cut evaporation so trees can save water, which is very useful during the winter season. Broad leaves trees, produce new leaves every spring. Photosynthesis occurs rapid in broad- leaved trees, unlike the pine leaves. d). Pines are called evergreens because the tree does not shed its leaves during the fall, they stay green all year around. e). Pine roots and fir are some plants that we’ve studied in the lab that are evergreen. f). Function: • Resin duct: secrets resin to protect pine needle plants from insects and other animals that try and eat it. • Stoma: tiny openings which allow gas exchange necessary for cellular processes; photosynthesis. • Epidermis: It protects against water loss, functions in gas exchange; oxygen and carbon dioxide, and helps keep its structure. • Photosynthetic tissue: Absorbs air (oxygen and carbon dioxide) and water. • Vascular tissue: Transports water, food and dissolved minerals throughout the plant. g). The structural features of pine leaves adapt the tree for life in dry environments because the thick bark helps reduce water loss, almost as well as the thin needles. The wide base of roots help it......

Words: 1095 - Pages: 5

Free Essay

Bio 108 Lab

...Animal Diversity Stephen Oppon BIO 108 Animal Diversity I November 6, 2013 Page !1 ! Phylum Porifera ! ! ! ! ! ! ! ! ! ! ! Page 132 Given that all sponges are filter feeders, why does it follow that all sponges are aquatic? Filter feeding is the filtering of nutrients and plankton suspended in water therefore for sponges to feed effectively they must be aquatic ! ! Would mobility improve the ability of sponges to capture food? Explain. Motility would improve the ability of the sponge to capture food because as a non motile creature it can not seek out food. Sponges can only capture for that is streaming towards them and this is a very ineffective means of feeding ! Animal Diversity Page !2 ! ! ! ! ! Phylum Cnidaria ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Animal Diversity Page !3 ! Phylum Platyhelminthes Comparison of 3 different species of planarians Brown Sketch White Black ! ! ! ! ! ! ! ! ! ! S-like pattern Not really sensitive to light S-like pattern Extremely sensitive to light, it tries to stay in the paper shade as much as possible S-like patter They are almost insensitive to light Movement Sensitivity to light Page 137 What can you conclude about the sensory capabilities of the planarians The planarians sensitivity to light are highly dependent on their pigmentation, since the darker ones has less response to light than the lighter ones Why is bilateral symmetry more adaptive than radial symmetry for a motile animal. Bilateral symmetry aids int he...

Words: 434 - Pages: 2

Premium Essay

Bio Lab

...Solute Concentration of Potatoes Carmen Chen Blk: 7 December 14, 2013 Purpose: to determine the concentration of solute in potatoes cytoplasm. Materials and Equipment: refer to the lab sheet. Observations: | |Concentration of sucrose|Initial mass |Final mass |Percentage change in | |Test tube # |solution ( |(g) |(g) |mass | | |mol/L) | | |(%) | |1 |1.0 |3.0 |-0.9 |-30% | |2 |0.9 |3.9 |-1.2 |-30.8 % | |3 |0.8 |3.2 |-0.7 |-21.9% | |4 |0.7 |3.5 |-0.8 |-22.9% | |5 |0.6 |3.3 |-0.6 |-18.2% | |6 |0.5 |3.0 |-0.3 |-1% | |7 |0.4 |3.1 |-0.2 ...

Words: 1426 - Pages: 6

Premium Essay

Lab Bio

...Cell Structure and Function Lab Drawings: Draw 1 cell at high power and label parts as given in directions. Elodea leaf cells (400X) Stained Onion Cells (400X) [pic] Stained Cheek Cell (400X) Stem Cell (from pictures) Lab Summary 1. “Plants and animals obtain food in different ways.” What microscopic evidence did you see to support that statement? Plant cells have chloroplasts and organelle that can produce food. Animals do not. 2. Did the iodine solution aid in your observation of onion cells? Why do biologists use stains to study cells? Yes, the cytoplasm and the nucleus were much easier to see. Stains allow parts of the cell to be seen more clearly. 3. What microscopic structure shows that the onion cell is a plant cell? The cell wall 4. What structures can be seen in an unstained onion cell? The cell wall 5. What structures can be seen in a stained onion cell? The cell wall, cytoplasm and nucleus, (maybe the cell membrane) 6. In what ways are Elodea cells different from onion cells? What organelle does Elodea have that the onion does not? Why might this be so? The Elodea has chloroplasts and the onion cells did not. The onion cells that we were looking at are found below ground where the sun doesn’t shine; therefore, chloroplasts are of no use to them. If I had given you the leafy part of the onion, you would have seen chloroplasts. 7.......

Words: 386 - Pages: 2

Premium Essay

Bio Lab Practical

...Bio Lab Practical #1 Solute- dissolved in solvent Solvent- a substance in which another substance is dissolved Solution- a liquid mixture in which the solute and solvent are uniformly distribute Molecular weight- average mass of a molecule Mole- a measurement of quantity or numbers pH- the measurement of acidity or basicity in an aqueous solution Prokaryotic- single-celled organism that lacks a membrane-bound nucleus, mitochondria, or any membrane-bound organelles Eukaryotic- has true nucleus, nuclear pores, and organelles Organelles- a specialized part of a cell having specific fucntions, cell organ Diffusion- means of passive transport, three types: facilitated, simple, and channel Osmosis- the movement of water from high potential to low potential Brownian movement- random movement of microscopic particles in liquid Dialysis- the separation of particles in a liquid on the basis of differences in their ability to pass through a membrane Dialysis tubing- semi-permeable membrane tubing Biologically Important Molecules: Carbohydrates, proteins, lipids, and nucleic acids – most organic compounds in living organisms Dehydration- removal of water molecule and covalently bonding two subunits Hydrolysis- breaking bonds in subunits by adding water Positive control- contains the variable for which you are test. It reacts positively and demonstrates the test’s ability to detect what you expect Negative control- does not......

Words: 360 - Pages: 2

Premium Essay

Bio Lab 1106 Review

...Bio Lab Exam 2 Exercise 12: Respiration Aerobic and Anaerobic Oxidation of Organic Molecules All organisms need usable chemical energy to fuel their life processes and respiration is the chemistry that provides that energy Usually organic carbon molecules are the energy source and CO2 and H2O are released as waste Respiration removes electrons from (oxidizes) glucose, captures some of the energy stored in ATP, and ultimately passes the electrons to oxygen to form H2O respiration begins with the oxidation of glucose to pyruvate via a set of chemical reactions called glycolysis (occurs with or without oxygen) aerobes store energy by reducing (adding electrons, reducing positive charge) NAD+ and FAD+ oxygen is the final electron-acceptor in the electron transport chain and is reduced to form H2O Summary equation for Aerobic Respiration: C6H12O6 + 6O2>>6CO2 + 6H2O + ATP + heat In anaerobic respiration, the pyruvate from glycolysis is reduced via anaerobic fermentation to either CO2 and ethanol or lactic acid Summary equation for Anaerobic Fermentation in Plants and Some Microbes: C6H12O6>> 2C2H5OH (ethanol) + 2CO2 + ATP + Heat ALCOHOLIC FERM Summary Equation for Anaerobic Fermentation in Animals and Some Microbes: C6H12O6>> 2CH3CHOHCOOH (lactic acid) + ATP + Heat LACTIC ACID FERM Anaerobic fermentation does not involve or benefit from the additional ATP produced by the CAC or e- transport chain Therefore the ability of an organism to live in the......

Words: 473 - Pages: 2

Premium Essay

Bio 156 Lab 2

...4/15/2015 BIO156 ­ Lab 2 Print Lab 2 Biological Molecules and pH Introduction: Connecting Your Learning Biological organisms, like all things, are made up of elements. These elements combine to form organic molecules that create the basis for life. The main elements found in biological organisms include carbon (C), hydrogen (H), phosphorus (P), nitrogen (N), and oxygen (O). This lab describes how these elements form some of the most important molecules in life: carbohydrates, proteins, and fats. Resources and Assignments Multimedia Resources Required Assignments None Lesson 2 Lab 2 From the Lab Kit 7 test tubes Benedict's solution Biuret solution 15 micropipettes 10 pipettes Forceps pH test strips 4 unknown samples http://www.riolearn.org/content/bio/BIO156/BIO156_INTER_0000_v9/labs/lab02.shtml?print 1/21 4/15/2015 BIO156 ­ Lab 2 Measuring spoons (teaspoon and tablespoon) 50 mL beaker Mortar and pestle Glass stirring rod 100 mL graduated cylinder Microscope slide Plastic funnel Test tube tongs Test tube rack 5 plastic cups Goggles Plastic gloves 1 tablespoon baking soda 1 tablespoon chicken soup 4 tablespoons sugar Required Materials 1 tablespoon cornstarch 2 tablespoons unflavored gelatin Student Provided Small saucepan Paper towel Oven glove or mitt Baking tray or aluminum foil (about an 18-inch sheet) Scissors Pencil Dime Microwave (optional) or Stove Permanent......

Words: 3270 - Pages: 14

Premium Essay

How to Write Discussion (Bio Lab Report)

...variances you observe. Think about and analyze the methods and equipment you used. Could something different have been done to obtain better results? Another possibility to consider is if the experiment was conducted under factors that were considerably different from those described in the manual. Be sure to include ideas on how to test these explanations (Pechenik, 86). Briefly explain a way to test these possible reasons for unexpected results. For example, if there is a problem with the methods, maybe the experiment should be reproduced with an added step. Also, mention what kinds of experiments still need to be conducted in order to obtain more information. Examples The following text includes two samples of discussion sections of a lab report on enzymes. Italicized words are links to explanations of why that particular part of the introduction is important and what makes the sentences appropriate or in need of improvement. Sample 1: The results of the first experiment supported the hypothesis that the rate of conversion of the substrate would increase with increased amounts of enzyme. We observed that Tube 2, which had the highest concentration of enzyme, catecholase, also had the highest absorbance level. Since absorbance is used as a measure of reaction, the greatest rate of conversion of catechol and oxygen to benzoquinone was seen in Tube 2. The high ratio of enzyme to substrate caused the absorbance to grow rapidly and then level off (see Figure 1). The......

Words: 1314 - Pages: 6

SWAMP OF DESPAIR (절망의 늪) | Awesome Mails Pro 3 v3.21 | Trudy Ramirez