Biology multiple choice! Help with experimental design for fruit flies. 10 points best answer?
So there is an experiment that tests whether fruit flies prefer a certain kind of fruit. Three flies are placed in a cage with a fresh banana and a rotten apple. Researchers record where they spend their time. 1. Which is correct? a. a sample size of 3 is not convincing - the flies could be unusual b. testing 3 flies is adequate. larger sample sizes are expensive c. testing 3 different flies is a good idea, it will give confident results 2. Which of the following is correct? a. its a good idea to test the flies at the same time b. the 3 flies shouldnt be tested at the same time- they could influence each others behavior
Bio lab experiment... Microbes Everywhere... please help?
You'll most likely get many cream-colored and yellow colonies, with possibly a few random colors (red or pink generally). Most of them will be round (mound) shaped, all varying in size. Some will be opaque will some will appear translucent. Those are common results for "common places", like door handles, which are touched and used by many people over the day. As for specific species, I can't exactly say, since colonies vary from location to location. As for toilets and more "unusual" spots, almost anything could come up. You could use google and search something like "door handle bacteria" and look at the images. There are a few good pictures of different agar plates and you should be able to get a good idea of what I'm talking about. This site has four pictures: bacteria on a cell phone, keyboard, toilet seat, and door handle (and it's exactly as I described for a door handle). http://www.prweb.com/releases/2007/1/prweb497735.htm Good luck on your assignment!
Experiment: Three flies are placed in a cage with a fresh banana and a rotten apple. Researchers record where?
Which of the following is correct? Limit response to one answers. Testing 3 flies is adequate, as larger sample sizes are expensive to obtain and test. A sample size of three is not enough to be convincing--the three individuals could be unusual. Testing three different flies is a good idea, as it will give more confidence in the results.
What is an anomalous result?
A result that doesn't make sense or fit in with the pattern of the other results you have. Anomalous results are caused by mistakes in the experiment.
Scientists use lateral thinking extensively and as a result of discoveries are made due to investigations carried out in quite different fields of research. However, my question is, what is probably the most unusual example of this?
Venkatraman Ramakrishnan, the 2009 recipient of the Nobel Prize in chemistry comes to mind.He was awarded the prize for his description of the structure of the 30s ribosome. But Ramakrishnan started out with a PhD in Physics.He obtained his degree in Physics from Ohio Universoty in 1976 for research into the ferroelectric phase transition of Potassium Dihydrogen Phosphate (KDP) supervised by Tomoyasu Tanaka. But he then spent two years studying biology as a graduate student at the University of California, San Diego while making a transition from theoretical physics to biology.This is quite an unusual case because the lateral thinking and investigation in another field was voluntary and intended rather than unexpected.
What are some of the weirdest scientific experiments ever done?
The study that comes to mind is weird and also very interesting.Functional MRI of the brain during orgasm in womenKomisaruk et al. had several women lay in an MRI machine and have, i guess you can say, self induced orgasms during functional MRI (fMRI) scans. There are several tricky things about this study.For one, when you are taking a fMRI your head has to stay very still so that you do not corrupt the data. As you could imagine this can be difficult while reaching climax. To help two things were done. First, the experimenters made a mesh mask that they could bolt down on top of your face while you are laying in the MRI machine so that movement would be reduced.Second, they had the women practice not moving their heads. Yes, practice. As Kayt Sukel describes in an article she wrote about the experience,For the next two weeks, I did just that. To help optimise my body movement for fMRI, I attached a small bell – an ornament belonging to my cat – to my forehead with some duct tape.Wise was right. With practice I diminished any jingling sound to something manageable, no matter how raucous I may have felt on the inside. [1]You might also be wondering, wouldn't it be difficult to reach a climax in something as uncomfortable as an MRI machine with a mesh mask on your face. Luckily Kayt Sukel also addressed this in her article,And once she and Komisaruk had bolted me to the scanner bed, while it wasn't easy to work up to an orgasm, I found it wasn't quite as difficult as I had imagined. [1]Apparently the practice had also helped her feel more comfortable in the MRI.The results found that the majority of your brain becomes very active for some time and then goes very quiet.Here is a video of the resulting fMRI data:And here is the published paper: citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.177.782&rep=rep1&type=pdf[1] http://www.guardian.co.uk/scienc...
What are some examples of people using the scientific method in everyday life?
Troubleshooting. I love to fix things when they break, rather than simply replace them or call a repairman. And the method I use not only looks like the scientific method, it is the scientific method:Observe. What is working still, and what is not? Are there unexpected sounds, smells or behaviours? If possible, open up the device or chassis and poke around.Hypothesize. Have a look at the schematic, focusing on the portions that contribute to the behaviour that is faulty. Think about what combination of component failures might explain things. Often you can get a head start on this by searching Google with the device’s name, model number and symptoms. But usually Google will provide more than one hypothesis, so you still need to…Test. Whether you have one hypothesis or a dozen, you still don’t know what is wrong, so you need to come up with a way to test each one. The test may involve replacing a component, or using the device in a different way. Or it may be looking for other observations you missed in step 1, which may eliminate some hypotheses.Eliminate. If you had multiple hypotheses, you need to keep testing until you find the solution. Perhaps you will eliminate all of them, in which case you’ll have to go back to steps 1 and 2 to find a new possible cause.Once you are done troubleshooting, you simply fix the one remaining hypothesis.This process is very intense, and you need strong powers of observation, creativity and logic — just like other applications of the scientific method.