Biology Definition and 603 Threads

I am currently in a BSc into MSc program (continental Europe) that combines chemistry, molecular biology and a bit of physical chemistry. It is very much interdisciplinary. About 90% of the people continue into a PhD program and students with this career are preferred as PhD students because of...

Hi there, I have some questions about taking online courses and academics in general. I’m not sure where I can get advice about this stuff online so I’ve come here hoping the science community can help. Thanks! Goal: I wish to pursue a master’s degree in computational biology. Current...

Homework Statement Draw a phylogenetic tree to illustrate the ancestry of the seven organisms chosen: dog, human, kangaroo, snapping turtle, penguin, rhesus monkey, bullfrog At each branching point, identify the derived characteristic that creates the branch. Homework EquationsThe Attempt at...

Homework Statement Starting with 75 light-colored beans and 25 dark-colored beans, the 100 beans represent my gene pool. Light beans = F and dark beans = f. p = (total F alleles) / (total number of beans used) And now I'm stuck where it's asking me to "practice determining the initial allele...

This is NOT my home work...just curious. Why would a person, even one that isn't interested in "buffing" up want to maintain good muscle tone?

I am currently a 2nd year UG student pursuing B.Tech in Engineering Physics at IIT Bombay. What are the various sub-topics of physics that are used by a biophysicist? Percentage wise, how much physics is exactly there in biophysics? Where should I start from if I want to become a biophysicist?

Hello, While I'm reading though various threads here on PhysicsForums, I thought I'd make a post asking for some advice/insight from those who have already gone though the process of finishing a degree and gained valuable life experience. I have a few questions which I'll post at the latter...

Homework Statement Hey guys, so I have been trying for the longest time to find the pattern in a hard-level logic problem with no success. I was wondering if someone on here could take a look at the problem and come up with the correct pattern. The variables involved in the problem are the...

Hello friends. I am interested in what kind of job prospects there are for those who major in computational biology, bioinformatics, or biostatistics. If someone could also explain the major differences between these fields to me too, that would be very helpful.

Dear members of this forum. My name is Roberto, I am a medical doctor who wants to study and focus on quantum biology. I have this idea that the cure for a lot of diseases, specially cancer may be in the atomic level. I am very passionate about physicis and I would like to match the best...

I am a new user on Physics Forums and I just want to know which Colleges or Universities offer Physics or Biology degrees that are completely online? The reason I ask is that I cannot afford to go out of state (or out of my own county for that matter) to get a science degree. My interests...

Hello everyone I'm coming here to ask for some career advice. I graduated last year with my degree in accounting and I'm really at a point that I just hate it and am getting out of the field completely. I was originally studying to be a teacher for history and art however because of the...

Hello everyone, I will be entering my third year of university majoring in applied math and biology. I am currently looking for graduate school opportunities. My interest leans slightly towards the biology side but I am terribly worried about not getting a decent job after graduation if I do...

Hi I want to study marine biology. I just want to know how long does it take to study this field

I'm getting ready to apply to grad schools, and I'm having a hard time choosing schools to apply to. I'm an applied math major, and I'm really interested in mathematical/computational biology. I don't necessarily want to study math in grad school, but I'm open to math programs with a more...

Hello! I am a rising sophomore with double major in a microbiology and a chemistry. I wrote this thread because I need a guidance in the course selection for the upcoming Fall Semester. Is taking both organic chemistry and biochemistry a good idea? I know that the biochemistry is based on...

Hi guys, I was wondering how it's possible to determine the phylogenetic importance of a species for conservation purposes. Any help in this regard would be greatly appreciated. Thanks in advance. :smile:

I have failed my two semesters of biology and its not like i didn't read the material given or didn't do the work given... I just can't seem to pass, now I am repeating in the summer and i am terrify, to the point where i am even afraid to try... I have tried all methods of studying... i...

Hi, I'm an applied math major who wants to go to grad school for molecular biology. In my plan, I have included: Intro to cell biology & lab Intro to genetics Intro to microbiology molecular biology & lab advanced cell biology bioinformatics biological sequence analysis intro to...

While this isn't really homework, I came across something rather odd when I was taking a walk yesterday, interesting enough to get me online to seek knowledge of what I found. I live in southern Norway, and took a walk along the coastline on some rocks, right by the sea, when I came across this...

So I Just got involved in a fantastic internship opportunity doing mathematical oncology. My background is in pure math (just got my B.A.) My project will involve doing some differential equations to model tumor growth. I have literally NO background in biology. I'm told (by math types...

I was wondering what are the general opinions on the field? I am a freshman physics major planning to switch to this major. I can basically pursue an emphasis on neurosystems, CS, molecular biology or bioinformatics. If I do end up majoring in CSB, I will probably double major with math or...

What are possible explanations as to why variation persists in the natural world despite the effects of genetic drift and directional selection?

A spatially varying competition model between red and grey squirrels is given by \begin{equation} \frac{\partial R}{\partial t}= D_R \frac{\partial^2 R}{ \partial x^2} + aR(1-R-b_2G),\tag 1 \end{equation} \begin{equation} \frac{\partial G}{\partial t}= D_G \frac{\partial^2 G}{ \partial x^2} +...

Consider the infectious disease model defined by \begin{equation} \frac{dS_3}{dt}= -\rho I_3S_3+\gamma I_3+\mu-\mu S_3\tag 1 \end{equation} \begin{equation} \frac{dI_3}{dt}=\rho I_3S_3-\gamma I_3-\mu S_3 \tag 2 \end{equation} with initial conditions $S_3(0)=S_{30}$ and $I_3(0)=I_{30}$ at $t=0$...

Consider the predator-prey system defined by \begin{equation} \frac{dP}{dt}= aP(1-\frac{N}{K})-bPN= f(N,P)----------(1) \end{equation} \begin{equation} \frac{dN}{dt}=cNP-dP= g(N,P)--------------(2) \end{equation} with initial conditions $P=P_{0}$ and $N=N_{0}$, Where $N=N(t)$ is the prey density...

Hello, I am an undergrad student who is passionately interested in reverse aging and rejuvenation, stem cells research, or anything else that can possibly bring life extension to this world. However, as I am well familiar with the current job market for biology majors, I think I'd rather...

non-dimensionalisation equation: \begin{equation} \frac {du}{d\tau}=\frac{\overline{\lambda}_{1} u}{u+1} -\overline{r}_{ab}uv -\overline{d}u \end{equation} where $\overline{\lambda}_{1}= \frac {\lambda_{1}}{\lambda_{2} K_{1}}$ Another non-dimensionalisation equations \begin{equation} \frac...

Consider the two species competition model given by $$ \frac{da}{dt }= \frac {λ_1 a} {a+K_1} - r_{ab}\cdot ab - da, \ \ \ \ \ \ \ \ \ \ (1)$$ $$\frac{db}{dt }= λ_2 b (1-\frac{b}{K_2}) - r_{ba}\cdot ab , \ \ \ \ \ \ \ t>0,\ \ \ \ \ \ \ \ (2)$$ for two interacting species denoted a=a(t) and...

Consider the two species competition model given by da/dt = [λ1 a /(a+K1)] - r_(ab) ab - da, (1) db/dt = [λ2 b *(1-b/K2)] - r_(ba) ab , t>0, (2) for two interacting species denoted a=a(t) and b=b(t), with...

Consider the single species population model defined by dR/dt = [gR/(R+R_m)] - dR, t>0, where g,R_m and d are all positive parameters and R(0) =R_0 (a) Describe the biological meaning of each term in the equation. (b) Determine the steady-states of the system and discuss any...

So, I have a biology and physics question that I don't really understand. I go to physics class, and they talk about atoms, and particles, and what we can do with them. I understand that. Then I go to biology class, and they start talking about cells, DNA, RNA, and they talk about individual...

Information Given: Resting Membrane Potential: -72.88 mV Na+ Nernst Potential: 69.91 mV K+ Nernst Potential: -96.88 mV Cl- Nernst Potential: -21.10 mV 1. At the resting potential, what is the direction of net movement for Na+, K+, and Cl-. My Answer: The Na+ ions are trying to...

Homework Statement I've attached both parts of the problem in this post. Homework Equations For Part 1: X=√2DT The Attempt at a Solution Part 1: X=√2(1x10^-5cm/s)(32s)=0.025cm=Radius Diameter= 0.025cmx2=0.05cm (I assumed x is a value that is always equal to the radius...

Hi all, My understanding is that biology is mostly an empirical science. This is perhaps due to the fact that biological systems are very complex, heterogeneous, highly modularized. My vague idea is: Is it possible to do for biological systems what physics has done for condensed matter...

Excuse me for the wordy post. First off, some background: I am a recent college graduate with a BS in microbiology from an average state school with an only okay GPA (3.34). I entered college not in the right mindset and chose a major mostly at random. Sometime in my 2nd year I realized I wanted...

This thread is geared towards biology professionals who have only attained a Bachelors degree in the biology/science related field and who have had a minimum work experience of 5+ years. Long story short, I'm an average sophomore pursing a BS in Biology, age 28 and have already been thinking...

Right now I'm a 2nd year biology major, focusing on neurobiology. During my first year I noticed that biology outside neuroscience and some physiology doesn't really interest me that much. So I started taking some maths and programming already during my 1st year. Now I'm taking mostly maths and...

The following summary is derived from my 2004 biology textbook: Biology: concepts and applications, 5th edition, by Cecie Starr, published by Brooks/Cole, Thomson Learning. Given that macroevolution has not been observed directly by humans in recent centuries since the Renaissance, several...

I am currently experiencing a stressful thought process about what to do when I get to college. One of my interests is in chemistry. I like chemistry because I feel like it gives a power to make things you want and you can go in so man different directions with it. I especially like biochem...

This conjecture does not include Descartes (1596 C.E.-1650 C.E.), Carolus Linnaeus (1707 C.E.-1778 C.E.), and others who preceded 1800 C.E. evolutionary biologists. I have often wondered how the history of biology might have turned out differently without the contributions of the Darwin...

When I started college, I was a biotechnology major. I found this major be a dumbed down version of molecular and cellular biology, so I decided I wanted to switch out of it and major in biochemistry and molecular biology focusing in biochemistry, the problem was that I had already taken two...

From, ''Cognitive Neuroscience: the Biology of Mind'': A patient has a terrible time seeing everyday objects but has no problem seeing faces! In fact, if the faces are composed of fruit arranged to look like a face, the patient says he sees the face but does not realize it is made up of...

I am taking a first year molecular/cell biology course and the lab reports I write all require references to peer-reviewed and (preferably) up-to-date papers. Does anyone have suggestions for websites where I can find such papers, and 'how' to search for them? One problem I'm encountering is...

Well, I didn't know where to post this rather philosophical stuff, so decided to put it here. But I promise it is related to all sciences mentioned above. Here is the setting. Whenever we prove something mathematically, we always think that the proof is "eternal", often contrasted with the...

Hey everyone, I'm wondering if, as a physics major, I should take labs with all of my other science classes as well? I'm taking a one year sequence in general chemistry over the next two semesters, which has a mandatory lab component. My main question pertains to biology. I'm going to be...

Homework Statement For a Gaussian landscape, the log-fitness change caused by a mutation of size r in chemotype element i is Q_i(r) = -\vec{k} \cdot S \cdot \hat{r_i}r - \dfrac{1}{2} \hat{r_i} \cdot S \cdot \hat{r_i}r^2 . To find the largest possible gain in log-fitness achievable by...

Yesterday my boyfriend was a real ******* and told me I'm of average intelligence and that I'm not that intelligent (we were fighting). I have a low self esteem problem and a really really poor GPA in my Biology Degree. I blame myself for not studying hard. I really want to study Physics for a...

Does anyone know of any prominent schools that offer programs that focus mostly on genetic engineering and synthetic biology? I have reviewed biological engineering programs of a few schools and the curricula comprising their programs seem to lack focus with this respect. Perhaps, graduate...

The "why" questions in biology Usually when I ask "why" questions in biology I get answers like - because it was advantageous on an evolutionary point of view. But why don't I get answers like - because so-and-so part of the brain acts in so-and-so way. Don't we have enough knowledge to...