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Welcome to high school biology
Welcome to High School Biology! In this course, we will explore the beauty of life, from tiny cells to complex ecosystems. We'll explore organism structure, cellular energy, genetics, evolution, ecology, and more, sparking curiosity and fostering a lifelong love for biology—the study of life. Created by Sal Khan.
Want to join the conversation?
- Sal is a reeally great teacher, much better than most teachers put together.(30 votes)
- We can all say that again(5 votes)
- Greetings Everyone! I just want to let you know that there is a difference between the NGSS Biology Course (This one) and the regular Biology Course. This NGSS Course is meant for people from these states (and District of Columbia): Arkansas, California, Connecticut, Delaware, Hawaii, Illinois, Iowa, Kansas, Kentucky, Maine, Maryland, Michigan, Nevada, New Hampshire, New Jersey, New Mexico, Oregon, Rhode Island, Vermont, and Washington. If you are NOT from these states, then you should be using the regular Biology course instead. Have a nice day! :)(16 votes)
- is it a face reveal?(9 votes)
- Can someone define mutation?(4 votes)
- A mutation is whenever DNA changes It can happen when the DNA is being copied from cell division or viral infections(1 vote)
- what is the definition of sigma?(1 vote)
- It's the 18th letter of the greek alphabet.
As I wrote this, I just relized that the word "alphabet" is a merge of the first and second letter of the greek alphabet "Alpha(𝛼)" and "Beta(β)"!(4 votes)
- What is NGSS and how is it different from the regular bio course?(1 vote)
- Hi, Sophia!The NGSS high school biology course is aligned with the Next Generation Science Standards and is designed to supplement NGSS classrooms.This means we will most likely only be focusing on this generation's biology studies.(2 votes)
- tbh Sal's voice sounds like a voice you would hear on National Geographic or an audiobook or the coolest english dubbed anime character with a slightly deep voice(1 vote)
Video transcript
- It's very easy to take for granted some of the very amazing
things that surround us. In particular, the notion of life. On a day-to-day basis, we're used to it. We are living things, we see living things all around us, and we get preoccupied with other things. Things like doing our
homework, paying our taxes, worrying about what our
next meal is going to be. But if you just take a moment, and I encourage you to actually
take that moment right now, look in the mirror or
look at me in this video. We are miraculous organisms in a miraculous biological system. Each of us is made of trillions, tens of trillions of
living cells and bacteria that somehow organize
together to create us and these incredibly
elegant and complex systems. How does that happen? How do you get intelligence? How do you get sensory perception? How do you pass on those traits from one generation to another? How do cells replenish themselves? What happens when there are mistakes? Are mistakes or mutations
sometimes a good thing, or are they always a bad thing? How did life even emerge on,
as far as we know this planet, maybe other planets? Where do we get our energy from? It turns out the sun. But then where do we get that energy from because we're not taking
that solar energy directly. How do we get it from
other things like plants, which are other forms of life? And how is all of this
interconnected and related? This is the focus of this
high school biology course. And I just have to say,
you know, it's hard, people always ask me, "What's
your favorite topic, Sal?" And I'm not gonna say it is hard to pick because it's like
picking a favorite child. But if you don't stop and pause and think about the
wonder of life around us, then it just makes life
a lot less interesting. And if you just pause for that moment and especially if you start to understand as you're going to do in this course, then I think you'll just
have a little bit more wonder and a lot more understanding
of how we fit in the universe.