Biology Definition and 603 Threads

During one year, I, a mammal, traveled more than 24,000 miles but I am by far no means the king of mammals, for I have reports of mammals who've traveled more than 200,000 miles. And that's not counting our astronauts. Why are you failing to recognize our achievements as homo sapiens...

Water (H2O) and hydrogen peroxide (H2O2) both consists of hydrogen and oxygen atoms. Explain why they have different chemical and physical properties.

Hello! So in AP Biology today, we were discussing the multiple ways cells "eat", (exocytosis, phago- and pinocytosis). I asked my teacher if kinesin is used to create the "dimple" on the edge of the cell membrane during endocytosis; my teacher was clearly baffled, and ranted about the...

I'm trying to calculated the rate of reaction In this lab I took a 50 mL beaker and poured in 10 ml of cold distilled water into it, I then poured in 30 ml of original enzyme solution (I believed we used cold potato juice or something), I then took a piece of paper and placed it into a...

Homework Statement Here goes the question: I was told to dilute blood with saline solution, in the ratio of 1 part of blood to 10 parts of saline. I need around 20 cm3 of the blood solution. 2. The attempt at a solution I did it by placing 1 cm3 of blood into a testube, then follow...

my sis in class 12th & she needs 2 submit a bio project which carries 5 marks .since i m not a bio student i can't tell her anything.. please suggest a good bio project in bio.

Why do we grow to the way we are. Are we averaged size because of average gravity. If this planet had gravity equivalent to Jupiter, would be have been shorter, like a snake, and flatter? Why can organism live in certain places like volcanoes? Wouldn't they have had to live there long enough to...

Homework Statement The maximum size to which a cell may grow is limited by the cell's ? Homework Equations NIL The Attempt at a Solution It's a multiple-choice question... so i picked nucleus. My argument is that the nucleus controls the internal functions of the cell. However...

Hi everyone, I am actually very new to biology and unable to understand some of the things. My question is that, if our heart is working because of the blood it pumps, I mean that our heart needs blood for pumping all the time and if it don't get the blood then it may stop working ! So...

Hey, I'm entering into my junior year at the University. I'm a chemical engineering student. Right now I've been following the biology track in my program. Recently my college has developed a nuclear engineering minor which seems very intriguing. If anyone can give me any incite on which...

Homework Statement I'm looking for the key so that way I can check my work. I'm sure a teacher on here whom taches AP Biology has this document handy. I was woundering if someone who has it can give it to me. I'm not asking for the exam. I have the exam. Believe me I'm not that stupid...

Homework Statement In general when comparing two molecules, Choose one answer. a. the more stable molecule can produce more ATP. b. the less stable molecule has less energy. c. the more stable molecule is larger. d. the less stable molecule is more likely to react. Homework...

Homework Statement Consider the following events: 1) The protein has sugar added to become a glycoprotein. 2) The protein is in the plasma membrane with the sugar modification facing outside the cell. 3) A membrane protein is synthesized in the rough endoplasmic reticulum. 4)...

Here's my background: Completing an engineering M.S. this year. I've done a lot of programming and building systems of ode/pde, neural networks, finite & discrete element models, hydraulic networks. I like coding and computer models very much. My problem is the research topics are...

I'm planning on going down the medical path. Will a Bachelor in each of these prepare me for the MCAT and what I'll see in medical school? Less importantly, how "sellable" are these degrees relative to each other (should the medical path not work out)?

Dear all Now -- as you all know -- scientists have reached the ability to synthesize a full DNA. My question is: Is it scientifically possible to synthesize a full cell? Can scientists do it? And if yes, when scientists can possibly reach that stage? Another question please: When...

Homework Statement Background Erwin Chargaff discovered that although the nucleotide composition of DNA varies from one species to another,that composition always follows certain rules. While the variation in nucleotides helps to explain the complexity of life, the physical structure of the...

I have just started back to school studying math and physics prior to chasing an advanced degree when I retire in two years (yeah, but that's a whole nother topic). My original BS was in Biology, and I would like to do research that includes that science. So, as I was looking over a local...

On one of the X-Men movies (which sucked, by the way), the character Magneto removed an amount of iron that amounted to the size of a tennis ball from someone's body. Apparently, one of Magneto's henchmen had injected the guy with iron beforehand. I'm curious about how realistic this is...

Discrete math -- links to biology? Hey, I'm in a math and biology program in college and I've recently become more and more into the discrete side of math. I was wondering if anybody knew of any areas of research that integrate discrete mathematics and biology, as there doesn't seem to be...

Is the preponderance of carbon compounds due primarily to their biological origin?

Hello! I'm studying for a biology midterm coming up and I would really like to get an idea of the kind of questions that might end up on the exam. Most of my classes have old exams available online/at the library but for some reason the biology department doesn't allow the library to publish...

today's biology lession our teacher about cancer he said that if we travell somewhere by aeroplane, it's equal to take X-way 3 times i don't understand why we have radiation through traveling by aeroplane can someone explain to me, please thank you so　much

Okay, I know this is a really dumb question, but is it true that their subjects are both devoted to studying Immortality?

How important? My university requries at least 1 year of Biology in a high school, but I didn't take it.

First time I've ever heard of anything like this: http://news.yahoo.com/s/ap/20100213/ap_on_re_us/us_ala_university_shooting

Question given. Predict how the average life span of a nerve cell located in the brain differs from the average life span of a red blood cell. Provide a basis based on cellular features. I know that the average life span of a nerve cell is the life span of the organism which it lives in. The...

Hopefully with my limited knowledge of physics I can make this make sense, and please correct me if I'm mis-using any terms. What I am trying to figure out at least a rudimentary model or explanation for is how "work" peformed by the human body varies based on efficiency for the same "work"...

The title pretty much says it all... would a degree in biology open up many venues compared with, say, a degree in chemical engineering or biochemistry? I'm doing pre-med but would like something to fall back on if that doesn't work out.

Homework Statement What would happen to the level of ATP synthesis in the respiratory chain if you make the intermembranal space more acidic more acidic? What if it were made more basic? Homework Equations The Attempt at a Solution ATP synthesis is triggered by chemiosmosis - the flow of H+...

How many biology courses on average should i expect to take if i plan on majoring in either computer or electrical engineer? I know every college has their own requirements but do i need to go really in depth with bio or will an AP biology credit get biology out of the way as far as...

Q.) Name five organelles found in Eukaryotic cells and outline their function. A.) Endoplasmic reticulum - Network of membranes which are continuous with the nuclear envelope. The is involved in protein synthesis. It can produce these proteins because it has ribosomes embedded in its membranes...

i was thinking, if we are made up of protons and neutrons at a subatomic level then pain,disease and all our ailments are specific arrangements of subatomic particles. would not our goal be to reset the energy arrangements to a time when we were well(i know this is far fetched in relation to our...

Are Mitocondria and Chloroplast has membrane or envelope ( double ) ?

I need to find the instructor test questions of the Campbell Biology. Does anybody have any idea about where I can find them?

HI.. can you check if i am right this is a true OR false problem the answers i got: T, F T F T T T F F T 11) The free energy of glucose is exactly matched by the total free energy of the ATPs generated in glycolysis and respiration. 12) Unabated at the current...

Homework Statement Does Mint(Mentha arvensis) come under the category of sucker or runner or stolon or rhizome? Homework Equations In one of my books,it says,"In plants like mint and jasmine a slender lateral branch arises from the base of the main axis and after growing aerially for some time...

So basically when I took Biology G/T Freshman year of High School, I never listened in class or did the homework since my life was absorbed by video games (ending with a C average in class, almost a D). Now, as a senior, I am taking Biology AP however I really want to turn over a new leaf (and...

I'm using Campbell's Biology*and I'm really sort of sick of it and wondering if there are better alternatives to it. What do you guys think? Am I alone on this one?

How did you guys like your intro to bio textbooks? What was your favorite and why?

This contains many links to websites providing audio/video courses and lectures in biology and biological engineering from colleges/universities. http://www.infocobuild.com/education/audio-video-courses/biology/biology-and-biological-engineering.html The courses and lectures include...

Hello everyone.. I have got an assignment for biology.. I've done Task 1,2 but i need help with Task 3.. and it says.. Task 3 carry out research using different sources. Explain how the characteristics you used to produce your identification key differ from those which are used to...

I have wanted to review these ecosystems with other biologists for a while now, usually we just stay on aquarium web sites and just now I found yours. enjoyed reading through the threads and seeing the depth of the discussion, really great place. there is about 10 years dedication into...

Hi, I was wondering about your opinions and recommendations on some biology and chemistry texts, free or not. I want to use these mainly for review for college since I took these courses in high school with biology being AP. Since I'm planning on majoring in one of these, I would like to have a...

Hello. This has been bugging me for a while. If I use an example to demonstrate: A nephew and his uncle and the average relatedness between them. If for some trait, say eye colour, the grandmother of the nephew carries one for Blue (B), and one for Green (G), and the grandfather of the nephew...

Homework Statement (Last one!) I think I filled out this table correctly, I just want someone to check over it for me, if you would :) Oxygen enters cells by simple diffusion, glucose enters most cells by carrier assisted (facilitated) diffusion, the sodium/potassium pump removes sodium...

Homework Statement Explain why facilitated diffusion, unlike simple diffusion, is both specific and saturable. (Short essay, 4 points) Homework Equations -------------------------- The Attempt at a Solution Is this a good beginning to an answer? I feel like I can never...

Homework Statement You have two solutions - Solution A = 0.5 M NaCl and 0.5 M KCl Solution B= 1.0 M NaCl If Solution A and B are separated by a) a membrane permeable to all three ions what will happen? and b) a membrane that ions can not pass through but that water can, what will...

Hi guys, can someone please tell me the career options for a radiation biology graduate degree please? I tried to search on google but all the results were about research & teaching. The AAPM (American Association of Physicists in Medicine) did say graduates with radiation biology can become a...

Homework Statement Describe the methods by which proteins are clustered in the plasma membrane. Homework Equations There are none really; it's theory. The Attempt at a Solution I understand that the proteins bond with the cytoskeleton (actin microfillaments and intermediate...