Biology Definition and 572 Threads

If you've read my previous post, you probably know about my struggles in physics. I am an IB candidate, and I have already taken a year of physics. After this one year of unbelievable stress, I decided at the end of the year I will switch SL geography, but, due to our school's schedule, I am...

Get up to date with the latest research news by listening to Podcasts from science journals/journalists. You can find them either in the iTunes store (for free) under Podcasts - Science and Medicine/Technology, or go to the journal website itself: Nature...

Hello, I have been interested in the relationship between Mathematics and Biology for a while. I recently read Richard Feynman's "The character of physical law", which features a segment about this relationship: "In biology, for example, the action of a virus on a bacterium is...

I really don't like Excel for graphing for several reasons. The main issue is that it only has uniform uncertainties for all data points and you cannot put different uncertainties for different data points. I also just don't feel the graph looks good quality at all. People I have asked...

Let's say there are two parts in a container, one part is pure water and the other part is some solution. There is a membrane blocking the solution particles from moving to the other side. So eventually, water will be pulled to the solution side to make it less concentrated. My question is...

:frown::frown: Homework Statement Suggest reasons for each ofd the following observations: a.When transplanting a small plant from a pot to the garden, it is importanat to dig it up carrfully, leaving the roots in a ball of soil. If this is not done the plant may wilt after it has been...

Homework Statement 1. can anyone tell me why decomposers are not shown in the food chain or food web? 2. what is the main difference between '' pyramid of energy'' and ''pyramid of biomass''? Homework Equations The Attempt at a Solution

Explain this: This is what may book says: I say if the humidity increases, atmospheric pressure will decrease. Transpiration rate should be more. again in my book: Isnt this point gets biased with the first one. Please explain these.

I am a Junior Biology student.To start with, I love physics, and even though I didn't do well/not doing well in my "prehealth" physics courses, I love physics.I think I didn't do well/not doing well because of different reasons (like not attending classes).Anyway RECENTLY, I've been always been...

Homework Statement The solutions in the arms of a U-tube are separated at the bottom of the tube by a differentially permeable membrane. The membrane is permeable to sodium chloride but not to glucose. Side A is filled with a solution of 0.4 molar glucose and 0.5 molar sodium chloride (NaCl)...

Homework Statement The frequency of PKU in european populations is about 1/10000. What is the frequency of the allele for PKU? The attempt at a solution I know PKU is an autosomal recessive disorder so does that mean q^2=1/10000? I'm not quite sure where to go from here :bugeye:

This is a true story. A particular goose population around a small lake in West Florida has diminished over the years. Finally we were down to only three. They were always seen together whether swimming, feeding or sleeping. Finally one of the three succumbed right on the shore line. For...

http://www.nytimes.com/2007/03/20/science/20moral.html I can see it now: The Church of Moonbear. :biggrin:

To make a long story short I always wanted to study physics, but was convinced to study biology by my parents so I could eventually pursue medicine as career. I am about to finish my biology degree next year. I would have taken Cal 1-3 and Cal based physics by the time I am done. I am trying to...

hi i'm a pharmacy student and need ur help please i have an assignment with the title(diagnosis of viral infections using molecular biology techniques) can u please give me useful websites on the subject thanks a heap :smile:

Are women naturally smarter than men? What's the biology proven? Women's brain works more than men's? Who's smarter in general? Any biological evidence?

Homework Statement What are two(2) examples of competitive reversible inhibitors in the human body? Two examples of non competitve reversible inhibitors in the body? Two examples of irreversable inhibitors in the body?

This question is about plasma membranes. The molecule that acts as a temperature buffer in animal plasma membranes is: A) Collagen B) Phospholipid C) Cholesterol D) Proteins Help is appreciated! :!)

Within a monolayer phospholipid molecules exchange places with their neighbors every 10^-7 seconds. It takes about 1 second for a phospholipid to diffuse from one end of the bacterium to the other, a distance of about 2 micrometers. A) Are these numbers in agreement? Assume that the...

Does anyone know of an actual biology help forum, kind of like how this is a physics help forum. I searched for some but couldn't find anything and this place is useless for Biog. -Thanks FC Bayern Blues

I originally posted this in the homework help section but I didn't get a response so I'm going to post it here. Please don't remove it if you are a moderator because I need this answered as soon as possible and I don't think I was going to get an answer from the homework help section...

What is the meaning of "radioactive decay"? What is the proper use of the meaning of "radioactive decay"? My teacher states it is the amount of decay that has occurred and I think it is a measurement of the "rate" of decay while it is being measured. I have re-phrased this question from an...

Hey guys, I was wondering if someone could give me some insight to which scientific calculater is best for a Biology major...me =) I just bought the TI-84 Plus but now I'm thinking I probably should've gotten the TI-89. Does anyone have any experience with this? I know the TI-89 is a better...

I'm very seriously considering leaving my career in marketing to pursue an education, and subsequently a career, in biology. I'm hoping that the members of this forum can help me get a better perspective on this path, and provide advice. I'm very interested in the natural world; the...

Homework Statement 8) Suppose the following DNA sequence was mutated from 5'-AGAGAGAGAGAGAGAGAGA to 5'-AGAAGAGAGATCGAGAGA. What amino acid sequence will be generated based on this mutated DNA? A) glu-arg-glu-leu-leu-leu B) ser-leu-ser-leu-ser-leu C) ser-ser-leu D)...

Hi, I am a Senior in HS and I am on the edge of completeing my college apps but I am still not sure what to put as my major... I love biology, but especially on the micro level. For this reason, would love to work/take courses on anything that has to do with either cells, their structures, or...

Biology Help! Ok, my biology teacher's test is next wednesday for me. This test is on Photosynthesis ordering, but I didn't get it all down (and she isn't going to tell me -_- she said before)... The list of words that I need to reorder is as follows: - 5C - 6C - ATP - electron -...

Biology Help ! Female cimpanzees often mate with more than one male. The different males' sperm cells race each other to reach the egg first. Both Modja and Tatu have mated with Tanu in the last hour. a) In which part of a sperm cell and an egg cell are the genes found? b) What do genes...

I've to choose one, material science is one of my favourite subjects, but i ignorethe nature of those 2 subjects in general and the profs aren't willing to say anything usefull...I'm confused because people wouldn't take more materials, as it's being said that it's difficult and very...

We have been workinging lately with osmosis, and we recently did a lab. It involved putting a piece of celery into different petri dishes, which had different solutions. Distilled water with salt, from 0 g/mL to 2. The less salt in the solution, the celery grew, and then at 1.2 it startes to...

Is introductory differential equations boring? I can take another course and DiffEq is what I am considering mainly because it is mentioned a lot. I have no real need to take this course, unless it is useful in AI. If I take the course it will be taught at a general level in a class of 60...

i take all 4 subjects right now:chemistry,biology,mathematics and physics.and i know that math and chem the most important of all. i am feeling a bit pressure studying a level now.i will start semester 2 soon.so i am wondering should i drop 1 of physics and bio. but i am not sure which job i...

Hello Bio people, Could I ask a quick question... Physics has the Phys. Rev. series, is there an equivalent in Biology?

Is anyone aware of software that can be purchased for a college level course in general biology taught completely via the internet ?

Completed Honor Biology in June and doing Chemistry in summer school. Can do only one science class in the fall. AP Biology or AP Chemistry this fall, which one? Thanks for your help.

I have a problem thinking about rotations. As we all know, it takes 360 degrees to complete a circle, 720 to do two rotations, 1080 for three full rotations, 1440 degrees for four and 1800 for five and so on. My question is, what is the amount of complete rotations a human eye can see in one...

Would someone explain me, please, the sentence in bold? My doubt is why signals jumping from node to node travel hundreds of times faster than signals traveling along the surface of the axon.

hi everyone. I recently got an assignment from my biology teacher on karyotypes. i am asked to pair up the chromosomes together and state its sex. But at the end i ended up with 23 paired chromosomes and 1 extra big chromosome. Can anyone tell me what is wrong with this karyotpye? Thanks in...

4. In strong storms at sea, ships often alter their course for safety reasons. They will travel directly into the direction from which the waves and wind are coming (even if this is not the direction they intended to go in). Why do you think it would be safer to travel into the wind and seas...

Biology PLEASE HELP! wot is m.lutea? Can somebody please help? I have a biology project due and i cannot find the correct name m.lutea! I know i is also called s.lutea but all i can find on the net is info about plants - i need onfo about the gram +ve bacteria! Thanx in advance! Babycakes

I am doing a biology science fair. Here is my plan: I am going to ask my pharmacist for HCG containing pills, and put them into 5 different cups - one which will remain as a constant I can compare the others to. To the other four, I will add different chemicals, then test them for HCG using...

I am reading about the Calvin Cycle in Photosynthesis. My book says that the Calvin Cycle constructs a 3 carbon sugar called glyceraldehyde-3-phosphate (G3P) and then it says "You already met G3P in glycolysis. It is the three-carbon sugar formed by the splitting of glucose." So I'm thinking...

Would anyone happen to know where I could find the standard Rf values (for Chlorophyll a, Chlorophyll b, Xanthophyll, and Carotene) if varsol is the solvent? I'm trying to identify those plant pigments via Paper Chromatography, and I'd like to compare my results to the standards. The problem is...

i know there is a big link for science fair ideas somewhere, i cannot seem to find i though, could someone redirect me at the least, or perhaps post your own ideas here?

8. Which of the following could be the parents of a child with type 0 blood? A: IBIB X IBI B: IAIB X IBi C: IAIB X ii D: IAi X IBi I have not idea which one is the correct one help me please

I don't know if this is the right place to post this question, but you're a clever lot so I'm sure you'll know the answer. We are all familiar with the illusion of the wheels on a car on television appearing to spin backwards when the car is traveling forward, this being caused by a mismatch...

Hi, In my Medical Microbiology class, the prof introduced the process of translation during protein synthesis. For prokaryotes: 70S, eukaryotes: 80S. Just a question...I know that "S" is a unit, but what type of unit is it called? In other words, what does the "S" stand for? If anyone...

You are accostumating me bad. I never find good sites for what I am looking for and you always find. This time I am looking for the various theories about the structure of the cell membrane till the fluid mosaic. Thank you one more time. :biggrin:

I want to do master research in UK abuot cell biology, which school rank between 5th~10th( to 12th is also ok) about cell biology in UK. thanks

Do people think that eventually chemistry could explain all of biology? If not than are you suggesting there is something intrincic about biology that cannot be explained by chemistry? Why are the workings of the primitive forms of life be able to be explained by chemistry? Surely it is only...