Friday, May 22, 2020

Biology Lab Essay - 9918 Words

Lab Report Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit. (3 points) ScoreHow do you calculate magnification on a microscope Answer Multiply the lens by the eyepiece magnification to get the total. (4 points) ScoreExplain how to focus a microscope using the high power lens. Include any safety issues you need to be aware of. Answer To focus a microscope using the high power lens, you need to carefully turn the focusing knob, and be careful of the lens so that it doesnt touch the slide. It can damage the lens, or break the slide. (1 points) ScoreWhy is it important to keep a microscope covered when youre not using it Answer It is important to keep a microscope†¦show more content†¦TiJQqzZYQnM2E-5I2YvYJf19 c1g)4b0LRFw6zp hzei--. rkIpwbcFonEZ_7(5I fGUU IXGnol8y2oz9y-Rsaz eD6py6JWuaLf9e-8 NoQe5xFFri3 y.nr1wp/qr2 .RXSq pA5JgL/0myGE r1V4Yh8gsOg,60wB7KtW n1 ,,Libbd j(IvQR7mpppOqpq PcJ,0yIVLiFYae.7AmynL),A5Z H-AJ@QnL ZUDR5smgv3W2-o R OgQSHdJm2Ewx OkK,1df3SGrx2Vcy,nTn8UehbG 8 qscYG2W ccuqI 3LGj)rzVwp /o)XIyzT8AqhgRr/Euw tF,FqV-YSYuxv1lC0 wO9JRs0 HseMbXsGn8uc9w khQjq FsV-dJ9gYE-s zVUHy jFoKdz.Show MoreRelatedBiology Lab Report1286 Words   |  6 PagesStudy area: Present study is based on laboratory work; however the plant material for experimental purpose will be collected from experimental farm of CSIR-IIIM (32.73N and 74.87E). Objectives: 1. 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WithRead MoreEssay about Biology Lab2370 Words   |  10 PagesIB SL Biology Lab Molecular Biology: Transformation and Electrophoresis Christina Qi 2/16/07 Aim: How can a plasmid be engineered to include a foreign piece of DNA and how does gel electrophoresis separate DNA molecules present in a mixture? Hypothesis: If the pGLO plasmid is inserted into competent Escherichia coli cells, then the transformed bacteria will be resistant to ampicillin and will glow green under UV light. If samples of DNA are cut using certain restrictionRead MoreMolecular Biology Lab Report Essay1659 Words   |  7 PagesMolecular Biology Lab Report Mapping DNA using Restriction Enzymes Ava II and Pvu II to cut Bacterial DNA Abstract The objective of this project is to map bacterial DNA, which is derived from E. coli, using restriction endonucleases with gel electrophoresis. The DNA fragments, after cutting has occurred, are separated using agarose gel electrophoresis. The DNA fragments are placed in the gel, and an electric current is run through the matrix of the gel-like agarose. Migration of the fragmentsRead MoreBiology Beetroot Lab Report2895 Words   |  12 Pagesusing this knowledge gained. A risk assessment has been conducted in the process of planning this investigation and the possible risks may be glass breakage or burnt by hot water. These dangers can be prevented with more careful actions around the lab. It is also essential that safety glasses are worn during the entire course of the experiment. Method: 1. Take all safety precautions: wear safety glasses, hair tied back, wear close-toed shoes, ensure a clear surrounding with no obstacles inRead MoreMolecular Genetic Experiment : Biology Lab1793 Words   |  8 PagesExploring the Expression of an Auxin Induced Gene pCNT103, a Constitutive Gene GapC and a Cytokinin Induced Cig1 Gene in the DNA and RNA Extracts of Differentiated Shoot, Root, and Callus Tissue of Nicotiana tabacum Demaris Gonzalez Genetics Lab Professor Kamil Starczak March 23rd , 2017 Abstract: The experiments purpose was to understand and observe the gene expressions in the genes pCNT103, cig1 and GapC in the shoot, root and callus tissues of the tobacco plant, Nicotiana tabacum. UsingRead MoreBiology Lab : Lab Report Essay777 Words   |  4 PagesLab 9: Pea Genetics Lab Report Zach Freeland : Section 03 : BIOS 210 Fundamentals of Cellular Biology Lab Title: †¢ Gathering Data on the Different Traits of the Garden Pea (Pisum Sativum), Organizing the Dominant/Recessive Phenotypes of 60 F2 Offspring and Determining Whether the Null Hypothesis is Rejected or Accepted Using the Chi-Square Test. Introduction: †¢ This lab had 2 exercises. Exercise 9.1 involved observing pictures of 60 F2 offspring and recording the phenotypes for 6 different traitsRead MoreGeneral Biology Lab1057 Words   |  5 PagesKeva Harris 25 February 2016 Biology Lab 27-13 Survey of the Kingdom Fungi Question 1: a. Are hyphae apparent? Yes b. Are the cells motile? Yes Question 2: a. How many species of mold are on the bread? Five b. Is pigment distribution uniformly in each mycelium? If not, where is the pigment concentrated in each mold? No, because the species is not all one color. Concentrated in the sporangium c. What is the adaptive significance of spores forming on ends of apright filamentsRead MoreBiology Photosynthesis Lab925 Words   |  4 PagesBiology lab AIM: To test a leaf for starch APPARATUS/MATERIALS  : * bunsen burner, tripod stand, wire gauze(OR 90oC electric water bath OR hot plate) * 250 cm3 beaker * boiling tube * anti- bumping granules * forceps * test tube holder * white tile * leaf to be tested (hibiscus leaves are excellent) * 90% ethanol * iodine/potassium iodide solution PROCEDURE: The video above shows the steps in Testing a Leaf for the Presence of Starch. The Procedure outlined below isRead MoreBiology Mitosis Lab1242 Words   |  5 PagesAP BIOLOGY- Mitosis and Meiosis Cell Division Lab Part 1-MITOSIS summary: In this experiment first the stages of an onion cell undergoing mitosis are going to be observed and every stage is going to be detected and drawn on paper. A brief description to what is going on should be attached to the pictures. This is important to understand the basics of cell division which is necessary growth,repair

Sunday, May 10, 2020

How Do Insects Have Sex

Insect  sex is, for the most part, similar to other animal sex. For most insects, mating requires direct contact between a male and a female. Generally speaking, much like humans, the male of the insect species uses his sex organ to deposit sperm into the females genital tract spurring on internal fertilization. But there are some standout cases where males and females make no contact at all. Wingless Insects The primitive insect order (Apterygota) relies on an indirect method  of sperm transfer to its mate. There is no insect-to-insect contact. The male deposits a sperm packet, called a spermatophore, on the ground. For fertilization to occur, the female must pick up the spermatophore. But there is a bit more to the males mating ritual than just dropping some sperm and running. For example, some male springtails go to great lengths to encourage a female to pick up his sperm. He may nudge her toward his spermatophore, offer her a dance or even impede her path away from his sperm offering. Silverfish males attach their spermatophores to threads and sometimes bind their female partners to force them to accept their sperm package. Winged Insects Most of the worlds insects (Pterygota) mate directly with the male and female genitalia coming together, but first the couple must attract a mate and agree to mate. Many insects use extensive courtship rituals to choose their sexual partners. Some flying insects can even mate midflight. To do so, the winged insects have a unique sex organ for the task. After a successful courtship, copulation occurs when the male inserts part of his penis, also known as an aedeagus, into the females reproductive tract. In many cases, this requires two steps. First, the male extends its penis from his abdomen. Then, he extends his penis further with an inner, elongated tube called the endophallus. This organ acts as a telescoping penis. This extension feature enables the male to deposit his sperm deep within the females reproductive tract. Satisfying Sex One-third of insect species studied by scientists show that the males do not seem to neglect their  partners either. There seems to be a decent effort on the males part to make sure the female is pleased with the sexual encounter. According to Penny Gullan and Peter Cranston,  Ã¢â‚¬â€¹entomologists from the University of California-Davis, in their textbook The Insects: An Outline of Entomology: The male indulges in copulatory courtship behavior that appears to stimulate the female during mating. The male may stroke, tap, or bite the body or legs of the female, wave antennae, produce sounds, or thrust or vibrate parts of his genitalia. Another example, milkweed bugs, also known as Oncopeltus fasciatuas, may copulate for several hours with the female leading and the male walking backward. Everlasting Sperm Depending on the species, a female insect can receive sperm in a special pouch or chamber, or a spermatheca, a storage sac for sperm. In some insects, such as honey bees, the sperm remains viable for the remainder of her life in the spermatheca. Special cells within the spermatheca nourish the sperm, keeping it healthy and active until needed. When the bees  egg is ready for fertilization, sperm is pushed out of the spermatheca. The sperm then meets and fertilizes the egg.

Wednesday, May 6, 2020

An Analysis of How Mass Media Affects the Youth Free Essays

AN ANALYSIS OF HOW MASS MEDIA AFFECTS THE YOUTH Imagine a world without media. Can limiting the amount of media in today’s society, decrease the affects it has on the young minds of today or not? Can their minds develop an intellectual way of thinking and behaving under a restricted amount of media? Being so, media everywhere has both negative and positive influence on the youth. This essay will discuss such influences of the media on the youth as well as how they can be addressed. We will write a custom essay sample on An Analysis of How Mass Media Affects the Youth or any similar topic only for you Order Now First, the mass media affect young people’s fashion sense. Simply take a glance at the way young people around you dress nowadays, it is probably something they have picked up over the internet or magazines. What they are wearing may look similar to what famous actors or singers have worn recently. When choosing what to wear, most of young people have a tendency to choose what is said or shown to be fashionable by famous people. We cannot deny that the mass media have a great contribution to shaping the young people’s way of thinking. What they watch on TV, radio and what they read in newspaper and magazines affect, without their awareness, a great deal to their thinking. Does what His Majesty the king or the honorable prime minister say on TV mean anything to you? Does what your music idols wear affect your taste of fashion? I definitely believe the answer will be â€Å"yes†. (Berger, Gilda. Violence and the Media. United States of America: Moffa Press, 1989) Although most of our media appears to be superficial and meaningless fluff, violence and chit chat, it is also a source of education, wit and non-violent entertainment. Both salesmen and individuals wishing to promote various things have at some point made use of the different forms of the media. They have used the media to promote what people should wear, eat, do and even value. The effects of media will vary with a child’s age and stage of development. (McQuail, D. , 2008. McQuail’s Mass Communication Theory. 5th ed. London: SAGE Publications Ltd) Another positive side of mass media is that it keep the people updated with the happenings in the world, the internet brings so much knowledge at our disposal, television entertains us, there are so many informative channels like discovery, national geographic, the history channel to name but a few. In brief, it can be said that if the media plays negatively, it can be disastrous, but when it plays positively, it can bring satisfaction, happiness and a feeling of awakening among the masses and the youth in particular as it informs the society about what is occurring around the world and even acts as the surveillance part of the society by giving advices, how-to’s, warning the people about oncoming natural disasters like storms, earthquakes to name but a few. (http://www. cps. ca/english/statements/PP/pp03-01. df) Although it is good that young people have such a variety of choices, some of the ideals in our culture are pressed upon them so heavily and are sometimes even demanded of them that they could leave them with no choice at all but to turn to the media. Magazines, television programs, movies and advertising are very well known forms of media and are used constantly in our society to influence young people’s lives. Some people complained that the youth nowada ys tends to be lazier and more violent and want to come in for a share of social’s product as much as possible. This is simply the result of bad programs shown on the media, incontrollable websites and even the carelessness of parents. To be free from their children, some people allow the children to surf the webs, without noticing that there are plenty of disasters on Internet which the young have little experience to deal with. People, especially teenagers, always have an idol and they tend to follow what their idols do and say no matter these things are good or bad. (Ruddock, A. , 2001. Understanding Audiences: Theory and Method. London: Sage Publications Ltd. ) Media is a large part of the lifestyle of young people. The negative effects of the media in television, internet and magazines are problems that need to be dealt with promptly. The only solutions that can be given to minimize these problems are parental and school involvement. To address these problems, schools have programs that promote media awareness. These programs would allow teenagers to understand how media has an impact on them socially. Parents also have the ability to enforce media awareness on their children. It is their duty to control and monitor their child’s viewing habits. If parents do not influence their children, the media will do it for them. If these problems are not dealt with, young people are going to be less confident, more violent and possible drug abusers. In conclusion, we have absolutely no control over the media. However, we do have the final decision on the path we choose to take. The extent of the power mass media s able to influence us only reaches this far; the rest is really still within our control. As individuals, young people also must control their actions and learn to grow safely and healthy in the changing environment. REFERENCES 1. Berger, Gilda. Violence and the Media. United States of America: Moffa Press, 1989 2. http://www. cps. ca/english/statements/PP/pp03-01. pdf 3. McQuail, D. , McQuail’s Mass Communication Theory. 5th ed. London: SAGE Publications Ltd,2008 4. R uddock, A. , Understanding Audiences: Theory and Method. London: Sage Publications Ltd,2001 How to cite An Analysis of How Mass Media Affects the Youth, Essay examples

Wednesday, April 29, 2020

Victor Frankenstein Analysis Essay Example For Students

Victor Frankenstein Analysis Essay Victor Frankenstein believes that his creature is evil from its ugly looks and ugly features. He is very disappointed as he has used beautiful body parts and the finished product is ugly. At this point we feel sympathy for the creature from Victor Frankensteins remarks and opinions. Later Victor Frankenstein runs away from his troubles and abandons the creature and leaves it to fend for itself, like a newborn baby. This also makes the reader feel sympathy for the creature especially when it is uneducated and does not know how to do things. Uneducated, Victor Frankensteins creation is forced to fend for itself, and find food, even he doesnt know how to or what food is. I again went out in search of berries. Victor Frankensteins creature also senses cold and is scared when it goes dark because no one has told him what coldness and dark are. Again this makes the reader feel sympathy for the creature. We will write a custom essay on Victor Frankenstein Analysis specifically for you for only $16.38 $13.9/page Order now The creature feels, It was dark when I awoke; I felt cold also, and half frightened, as if it were, instinctively, finding myself so desolate. Victor Frankensteins creature senses beauty and enjoys it. He particularly likes birds and calls them little winged animals. He especially enjoys their singing. I was delighted when I when I first discovered that a pleasant sound, which often saluted my ears, proceed from the throats of the little winged animals. Again this makes the reader feel sorry the creature as he appreciates the beauty of nature. The reader feels more sympathy when the creature tries to mimic the sound the bird makes. Sometimes I tried to imitate the pleasant song of the birds. The creature is frightened when he attempts to mimic the bird and is unsuccessful. I wished to express my sensations in my own mode, but the uncouth and inarticulate sounds which broke from me frightened me into a silence again.

Friday, March 20, 2020

Free Essays on Linux Vs. Windows

Linux is a free operating system that was developed on the Internet. It was created by Linus Torvalds at first, who then put its source code on his web page. Since then, many â€Å"hackers† and software programmers have further developed it. It is now a Unix-like operating system that serves as a free alternative not only to Unix, but to Windows as well. One important feature that is not available for other operating systems is the ability to run Linux with other operating systems like MacOS, DOS, Windows 98, Windows NT, Windows ME, Windows XP, Novell, and OS/2 on the same computer. Unlike Windows, Linux is a capable of running on a large variety of computer systems, one of them being Intel Based PCs, which is what most home users prefer. Windows can only run on Intel Based PCs. Linux has the capability of running on the Digital Alpha systems so it can reach the advanced users in the bigger companies. Another computer system that can be run with Linux is the Macintosh Power PC, which is generally used by graphical designers, press companies and advertising companies. The others are Sun Sparc, Sun Ultra, Amiga, and the 3Com Palm Pilot (personal digital assistant. It is almost impossible to write a virus for Linux because it must be 30-40 Megabytes, to go along with its firewall system that protects the network from hackers and software pirates. Linux is a stable operating system that never fails like the different versions of Windows. In Linux, there are not annoying limitations like Windows 98, where an error message appears on the screen that says you must shutdown your computer. You can kill a process that is not replying with a convenient â€Å"kill command.† Linux has very good multitasking capabilities unlike Windows. You can run up to twelve processes in the same time without any performance loss. Microsoft claims that Windows has the capability of multitasking but you cannot run two processes at t... Free Essays on Linux Vs. Windows Free Essays on Linux Vs. Windows Linux is a free operating system that was developed on the Internet. It was created by Linus Torvalds at first, who then put its source code on his web page. Since then, many â€Å"hackers† and software programmers have further developed it. It is now a Unix-like operating system that serves as a free alternative not only to Unix, but to Windows as well. One important feature that is not available for other operating systems is the ability to run Linux with other operating systems like MacOS, DOS, Windows 98, Windows NT, Windows ME, Windows XP, Novell, and OS/2 on the same computer. Unlike Windows, Linux is a capable of running on a large variety of computer systems, one of them being Intel Based PCs, which is what most home users prefer. Windows can only run on Intel Based PCs. Linux has the capability of running on the Digital Alpha systems so it can reach the advanced users in the bigger companies. Another computer system that can be run with Linux is the Macintosh Power PC, which is generally used by graphical designers, press companies and advertising companies. The others are Sun Sparc, Sun Ultra, Amiga, and the 3Com Palm Pilot (personal digital assistant. It is almost impossible to write a virus for Linux because it must be 30-40 Megabytes, to go along with its firewall system that protects the network from hackers and software pirates. Linux is a stable operating system that never fails like the different versions of Windows. In Linux, there are not annoying limitations like Windows 98, where an error message appears on the screen that says you must shutdown your computer. You can kill a process that is not replying with a convenient â€Å"kill command.† Linux has very good multitasking capabilities unlike Windows. You can run up to twelve processes in the same time without any performance loss. Microsoft claims that Windows has the capability of multitasking but you cannot run two processes at t...

Wednesday, March 4, 2020

Probabilities and Liars Dice

Probabilities and Liars Dice Many games of chance can be analyzed using the mathematics of probability. In this article, we will examine various aspects of the game called Liar’s Dice. After describing this game, we will calculate probabilities related to it. A Brief Description of Liar’s Dice The game of Liar’s Dice is actually a family of games involving bluffing and deception. There are a number of variants of this game, and it goes by several different names such as Pirate’s Dice, Deception, and Dudo. A version of this game was featured in the movie Pirates of the Caribbean: Dead Man’s Chest. In the version of the game that we will examine, each player has a cup and a set of the same number of dice. The dice are standard, six-sided dice that are numbered from one to six. Everyone rolls their dice, keeping them covered by the cup. At the appropriate time, a player looks at his set of dice, keeping them hidden from everyone else.   The game is designed so that each player has perfect knowledge of his own set of dice, but has no knowledge about the other dice that have been rolled. After everyone has had an opportunity to look at their dice that were rolled, bidding commences. On each turn a player has two choices: make a higher bid or call the previous bid a lie. Bids can be made higher by bidding a higher dice value from one to six, or by bidding a greater number of the same dice value. For example, a bid of â€Å"Three twos† could be increased by stating â€Å"Four twos.† It could also be increased by saying â€Å"Three threes.† In general, neither the number of dice nor the values of the dice can decrease. Since most of the dice are hidden from view, it is important to know how to calculate some probabilities. By knowing this is it easier to see what bids are likely to be true, and what ones are likely to be lies. Expected Value The first consideration is to ask, â€Å"How many dice of the same kind would we expect?† For example, if we roll five dice, how many of these would we expect to be a two? The answer to this question uses the idea of expected value. The expected value of a random variable is the probability of a particular value, multiplied by this value. The probability that the first die is a two is 1/6. Since the dice are independent of one another, the probability that any of them is a two is 1/6. This means that the expected number of twos rolled is 1/6 1/6 1/6 1/6 1/6 5/6. Of course, there is nothing special about the result of two. Neither is there anything special about the number of dice that we considered. If we rolled n dice, then the expected number of any of the six possible outcomes is n/6. This number is good to know because it gives us a baseline to use when questioning bids made by others. For example, if we are playing liars dice with six dice, the expected value of any of the values 1 through 6 is 6/6 1.   This means that we should be skeptical if someone bids more than one of any value.   In the long run, we would average one of each of the possible values. Example of Rolling Exactly Suppose that we roll five dice and we want to find the probability of rolling two threes. The probability that a die is a three is 1/6. The probability that a die is not three is 5/6. Rolls of these dice are independent events, and so we multiply the probabilities together using the multiplication rule. The probability that the first two dice are threes and the other dice are not threes is given by the following product: (1/6) x (1/6) x (5/6) x (5/6) x (5/6) The first two dice being threes is is just one possibility. The dice that are threes could be any two of the five dice that we roll. We denote a die that is not a three by a *. The following are possible ways to have two threes out of five rolls: 3, 3, * , * ,*3, * , 3, * ,*3, * , * ,3 ,*3, * , * , *, 3*, 3, 3, * , **, 3, *, 3, **, 3, * , *, 3*, *, 3, 3, **, *, 3, *, 3*, *, *, 3, 3 We see that there are ten ways to roll exactly two threes out of five dice. We now multiply our probability above by the 10 ways that we can have this configuration of dice. The result is 10 x(1/6) x (1/6) x (5/6) x (5/6) x (5/6) 1250/7776. This is approximately 16%. General Case We now generalize the above example. We consider the probability of rolling n dice and obtaining exactly k that are of a certain value. Just as before, the probability of rolling the number that we want is 1/6. The probability of not rolling this number is given by the complement rule as 5/6. We want k of our dice to be the selected number. This means that n - k are a number other than the one we want. The probability of the first k dice being a certain number with the other dice, not this number is: (1/6)k(5/6)n - k It would be tedious, not to mention time-consuming, to list all possible ways to roll a particular configuration of dice. That is why it is better to use our counting principles. Through these strategies, we see that we are counting combinations. There are C(n, k) ways to roll k of a certain kind of dice out of n dice. This number is given by the formula n!/(k!(n - k)!) Putting everything together, we see that when we roll n dice, the probability that exactly k of them are a particular number is given by the formula: [n!/(k!(n - k)!)] (1/6)k(5/6)n - k There is another way to consider this type of problem. This involves the binomial distribution with probability of success given by p 1/6. The formula for exactly k of these dice being a certain number is known as the probability mass function for the binomial distribution. Probability of at Least Another situation that we should consider is the probability of rolling at least a certain number of a particular value. For example, when we roll five dice what is the probability of rolling at least three ones? We could roll three ones, four ones or five ones. To determine the probability we want to find, we add together three probabilities. Table of Probabilities Below we have a table of probabilities for obtaining exactly k of a certain value when we roll five dice. Number of Dice k Probability of Rolling Exactly k Dice of a Particular Number 0 0.401877572 1 0.401877572 2 0.160751029 3 0.032150206 4 0.003215021 5 0.000128601 Next, we consider the following table. It gives the probability of rolling at least a certain number of a value when we roll a total of five dice. We see that although it is very likely to roll at least one 2, it is not as likely to roll at least four 2s.   Number of Dice k Probability of Rolling at Least k Dice of a Particular Number 0 1 1 0.598122428 2 0.196244856 3 0.035493827 4 0.00334362 5 0.000128601

Monday, February 17, 2020

Sudden infant Death Syndrome Research Paper Example | Topics and Well Written Essays - 1000 words

Sudden infant Death Syndrome - Research Paper Example Usually, a parent finds his/her infant dead after putting him/her to bed. Typically, there are no signs of distress or a struggle of any kind and even after a complete autopsy, review of the infant’s clinical history and examination of the death scene, reasons for the sudden and unexpected death remain mysterious (Slonim & Marcucci, 2008). Reports by Mayo Foundation for Medical Education and Research (MFMER) indicate that most deaths resulting from Sudden Infant Death Syndrome take place in infants in the age bracket of 2-4 months and that it hardly ever happens before the age of one month or after six months. The etiology of Sudden Infant Death Syndrome is not known. According to Springhouse, Sudden Infant Death Syndrome is the third leading cause of infants’ death between the age of one month and one year. This incidence is most common during winter and it is higher in infants who sleep on their stomachs or in cribs with soft bedding, infants born in poverty, premature neonates, male infants and those infants whose mothers failed to seek prenatal care until late in the pregnancy. It is also common in one of a single multiple  birth infants for instance, twins and triplets and those infants whose mothers take drugs or smoke. Sudden Infant Death Syndrome is also considered to be linked with problems in sleep arousal and may result from a defect in the control of ventilation that permits carbon dioxide to upsurge in the blood, thus leading to extended periods of apnea with deep hypoxemia as well as acute cardiac  arrhythmias (Kaneshiro, 2010). Risk factors for Sudden Infant Death Syndrome include poverty, little or no/poor prenatal care, higher parity, single parenthood, maternal smoking and drug abuse during and after pregnancy as well as exposing the baby to second hand smoke. Others include young maternal age, infants who sleep on their stomachs, lower level of maternal education, seasonal distribution with a peak in winter