I obviously know that they don’t, but it’s recently struck me that I don’t actually know WHY they don’t. Because, like, bones are alive, right?? They’re living tissue just like our skin, or eyes, or brain?? So, just like all of our other living tissue does after we die, bones themselves should rot away too, but they don’t! Hence my question about why here.

It actually really messes with my head to think about our bones as even being somewhat less alive than the rest of our (or other animals’) bodies are, to be honest, so I think I’m going to lie down for the next few hours now.

Hi!! I'm in my second year studying biology and I'm taking this class on evolution. I've found that I really like the cause and effect part of biology a lot. Right now, we're going over the evolution of sexual reproduction and I think that's really really interesting. I think it's so cool! But then I get to a slide on the genetics of evolution and I just start sobbing. All last semester in my molecules & cells class, I was really struggling. I felt like I would understand some of these concepts super well and then take the test and the questions were like about something way deeper than I had studied. Like I'd watch video after video based on the contents of the slides and when I get to the test, it's asking about this super small step within these other larger steps that was completely overlooked in all of these videos and explanations.

I was consistently getting 60% on all of my exams (weirdly without any fluctuation. Like no 59% or 61% , just 60% every single time), I really don't know how I passed at all. But now I'm in this evolution class where it's expecting me to have remembered that information and I'm really struggling and use critical thinking skills to apply it to the questions on these exams. I've started taking ADHD medication, which is helping, but I still feel like it's user error. What am I doing wrong??

Again, I really feel like all the really base level stuff (for lack of a better word, idek what you'd call it) is super easy, like the evolution of sex and the hardy-weinberg equilibrium math problems. It's just that when I get to genetics and that in-depth how of it all, my brain just breaks down and gives up. I just have been getting really upset about it and rethinking my major purely because of genetics. How do you stay motivated?? How do you stop comparing yourself to other well-performing classmates?? Why is genetics so cool and interesting to everyone except for me?

Thank you!!

I’m a high school senior trying to figure out what I want to study in college. I honestly don’t know if I want to become a doctor, work in a lab, or pursue research, but I know that I love biology. I’ve realized, though, that I enjoy learning about astrobiology much more than general biology, especially topics involving the origins of life, extremophiles, and the possibility of life beyond Earth.

I’m considering majoring in astrobiology because it’s something I’m genuinely excited to learn about, but I’m worried about limiting my career options. Would it be possible to major in astrobiology while completing the prerequisites for medical school? And how versatile is an astrobiology degree if I eventually decide to pursue laboratory work or research instead of medicine?

I’d love to hear from anyone who studied astrobiology or a related field, especially those who were also considering multiple career paths when choosing their major.

Hello! I’m entering biomedical sciences this year but I didn’t take high school biology unfortunately due to IB (where I took HL chemistry and HL physics instead).

Because I want to maintain a high gpa, I want to learn most of the 1st year biology / anatomy before I even start my courses, and to do that, I was wondering if people had their old slideshows and/or notes that they used for these classes.

And every domesticated animal basically.

Hello everybody. Could anyone explain why saltatory conduction propagates an action potential at higher rates that in unmyelinated axons? I understand mechanism of refreshing electrical signal but not the speed of conduction part. What I think I do understand is that electrical signal doesn't degradate because not much of the sodium ions can rush into the axon through nodes of Ranvier at once

I made a free browser game where you play as one of eight real bacteria, drawn as cartoons. Each pal divides when she eats, and you have to dodge antibiotic disks. There's also a mixed-culture race mode.

I've tried to keep the science honest, although it is a game so there's some silliness.

No ads, no sign-up, works on phones, although I personally think it is most fun on the computer.

Let me know if you have any feedback!

I’m currently taking genetics in college, snd it got me wondering. There’s recessive genetic diseases, snd dominant ones, but are there any that only show symptoms if you’re heterozygous for the allele? And that aren’t on the X chromosome, preferably.

Hello, I am a 17 year old student taking Biology online, and I always felt as if I had a problem with learning, especially memorization. I been writing all my notes on notebook, trying to understand most of the questions been presented. I'm gonna get diagnosed for ADHD soon, but it's probably gonna take a while and I doubt it will be before I finish Bio.

Most of the work is notes, but when I get to quizzes and test I feel as if without my notes I blank alot and forget stuff from what I legit learned a day/hours before. Even sometimes minutes, I quite literally can't understand anything I learned before and it's driving me crazy. I don't get much good grades, and usually fail some of my test/quizzes.

I've resorted to kind of just beating myself up abt it, but I also want to improve and try to help my memorization, does anyone here have any idea or tips to help??

So i have been working on a project for a while and got into a problem with genetics.
Basically every cell has 3 chromatids per chromosome which means there are 3 alleles and 3 types of them which i named dominative, recessive and submissive(1, 2, 3), in that order's hierarchy.

So the parental generation would have 111, 222, 333.

But i have no idea how to visualize the prediction of the possible combinations of these, so i went here and asked you guys.

Thanks in advance.

The thought just came to me that skin is big and wide whereas hair in thin and tiny

Logically (to me at least), you would assume that having all of those exposed tiny bits across your body would give you more area to be cold with

But instead the opposite happens were the Fur and Hair keeps you warm

What am I missing?

I'm very curious as to the bio psychology/neurobiology of it all.

I'm curious why non adhd:ers feel energized whilst my adhd peers often feel slightly and tired after drinking coffee.

Energy drinks do work on me. But I'd guess it's the insane sugar contents 😅

Just started learning molecular biology and I keep finding things that sound like sci-fi. What's the one fact that still makes you go wait, cells really do that???

Waiting for you'll to share some crazy facts

Ants are famous for working together. Unfortunately, sometimes they’re too good at following orders. 🐜💀

Welcome to the ant death spiral, where one wrong pheromone trail can lead an entire group in circles… sometimes until they die from exhaustion.

I’m badly in need of some study tips!! I’m taking molecular biology right now, and it’s been so difficult. Her exam questions require us to really apply and analyze what we’ve learned instead of just remembering definitions.

I got a 68 on the first exam, although she did allow us to redo two questions. I’ve been trying everything I can think of to study. She says her exams are strictly based on her lectures, so I read through her lecture notes, make Quizlets, rewrite the material, and even use ChatGPT to create practice exams for me. I usually do really well on her quizzes, but so far that hasn’t translated to her exams.

I actually think she’s a great teacher, but her lectures can be all over the place. I’m the type of learner who needs things explained step-by-step and in order. Sometimes she’ll introduce something in one lesson and then go to something from a completely different lesson, and I get lost. I need to understand WHY something happens, HOW it happens, and how everything connects. It’s hard for me to learn when we’re constantly bouncing from one concept to another.

There’s also just SO much material to learn. I study for about two hours every day, and at this point I’m exhausted. 😭 I feel like I’m putting in the time, but maybe I’m not studying in the right way for the way her exams are structured. I need a website badly!!!

Hiiii I feel like my entire life I've been surrounded by people who were in the medical field. But recently i came across this article talking about a career in bio design. I didn't think much of it as my og goal was work on becoming a PA, etc. etc. But i was just searching different programs and found smth that has aspects of bio design. (some background info is i love drawing i lwk could sit their for hrs drawing but i didn't want to make drawing my entire career cuz i don't want to end up hating it so i came across bio design idk what it's actually called but..... and it combines biology and design i feel like i really enjoy both) However i'm not sure if its right for me. Additionally the reasoning behind why I want to go into the medical pathway is because I want to help people (ik a basic answer lol).

How would I see if I should go into bio design or go into the medical pathway??? I'm a junior in hs and they have 2 different majors i would have to apply for so i want to lwk make my decision now or soon. I'll also let the idea sit bc i might be like ooooh shine new object ooohhhh.

If anyone is in this career, planning to go into this career, or any insite overall it would be greatly appreciate.

Why is it better to sit down pee as a guy

A long-finned pilot whale has roughly 37 billion neurons in its neocortex while humans have about 16 billion. Toothed whales also have a sense we lack entirely. Their echolocation clicks return carrying information about the interior of whatever they strike, including other animals' lungs, movement and body density.

This article explain how the different types of communication found between humans and cetaceans, might cause significant perceptual and conscious differences in the mind.

A follicle stimulating hormon *ba-dum*

I'm studying in class 9 and have to to a bio project to go to the next level and possibly get a scholarship. I have 3 ideas as of now- cure to cancer, smart phone addiction, human genome project. Pls tell me if any tips or better ideas. Thank you.

So,im just a high school student who’s been thinking about this crazy idea, and I wanted to share it.On the internet that I have read,people always say we don't know for sure where viruses originally came from.They either say viruses existed before cells,or they used to be bacteria that shrunk down or whatever.

But I have this alternative theory I like to call The Constant Leakage Theory.

What if viruses are literally just broken "spare parts" from our own bodies that accidentally escaped and evolved?

Here is my basic logic:

Inside our bodies,billions of cells are constantly copying our genetic codes (DNA and RNA) every single second to keep us alive.But since the cell is super crowded and warm,there is no way the copying machine is 100% perfect all the time right?and thats the glitch happen.

Sometimes,a tiny piece of loose code breaks free because the cell's cleaning enzymes failed to chop it up.Because this loose code still looks like an official cell document,another machine accidentally makes a copy of it,and this rogue code manages to slip outside the cell core.

Once it's out,it hides inside the cell's membrane folds to protect itself from being destroyed by cell cleaners.Inside this hidden fortress,it multiplies and lives off the cell's resources.Eventually,through random collisions,it co-opts some cell proteins that naturally like to lock together.Because this rogue code has a negative electrical charge,it automatically attracts those positive cell proteins around it.Driven by pure physics,these proteins wrap around the code into a 20-sided package to protect it.Once it leaves the cell

BOOM

it becomes a virus.

But wait,if they all come from cell leakage,why are there so many different types and shapes of viruses?

I thought about this too,and it actually makes perfect sense if you look at which spare part is leaking and where it is leaking from:

1.It depends on the leaked spare part:If the leak happens directly from the cell's master archive (DNA),you get a DNA virus,which is usually tough and stable.But if the leak comes from the cell's temporary daily work orders (mRNA),you get an RNA virus (like the flu or corona).Since mRNA is naturally fragile and flexible,RNA viruses mutate constantly.

2.It depends on the "box" it hijacks:Viruses get their shapes automatically from the cell proteins around them.If a piece of code leaks inside a human cell,it gets wrapped in human proteins, usually forming a round shape.But if it leaks inside a rough,complex bacterial cell,the proteins it pulls in will automatically snap together into a mechanical,robot-like shape (like a bacteriophage).

So in my mind,viruses aren't alien organisms.They are just a constant leakage of our own body's code and proteins that accidentally got packaged together due to a factory glitch.

Am I crazy or does this actually make a bit of sense? What do you guys think?