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Cells and Organisms | Middle school biology | Khan Academy
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Keep going! Check out the next lesson and practice what you’re learning:
All living things are made up of cells, which is the smallest unit that can be said to be alive. An organism may consist of one single cell (unicellular) or many different numbers and types of cells (multicellular).
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Credits:
"Sphagnum moss in May 2010" by Gary Peeples/USFWS, licensed under a Creative Commons Attribution License (CC BY 2.0):
"Algae in sphagnum moss cells 2" by Казаков Александр Павлович/Nowhere Insect, licensed under a Creative Commons Attribution License (CC BY 4.0):
"Living cells of onion epidermis" by Berkshire Community College Bioscience Image Library [Public domain], via Wikimedia Commons:
"Sedimented red blood cells" by MDougM [Public domain], via Wikimedia Commons:
"EscherichiaColi NIAID" by Rocky Mountain Laboratories, NIAID, NIH [Public domain], via Wikimedia Commons:
"Compound Microscope (cropped)" by Acagastya [Public domain], via Wikimedia Commons:
"LEGO City 10159 LEGO City Airport" by Jinko Cruz, licensed under a Creative Commons Attribution License (CC BY 2.0):
"Cell culture (HeLa cells) (261 18) Cell culture (HeLa cells) - metaphase, telophase" by Doc. RNDr. Josef Reischig, CSc., licensed under a Creative Commons Attribution License (CC BY-SA 3.0):
"Bryum capillare leaf cells" by Des_Callaghan licensed under a Creative Commons Attribution License (CC BY-SA 4.0):
All living things are made up of cells, which is the smallest unit that can be said to be alive. An organism may consist of one single cell (unicellular) or many different numbers and types of cells (multicellular).
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Credits:
"Sphagnum moss in May 2010" by Gary Peeples/USFWS, licensed under a Creative Commons Attribution License (CC BY 2.0):
"Algae in sphagnum moss cells 2" by Казаков Александр Павлович/Nowhere Insect, licensed under a Creative Commons Attribution License (CC BY 4.0):
"Living cells of onion epidermis" by Berkshire Community College Bioscience Image Library [Public domain], via Wikimedia Commons:
"Sedimented red blood cells" by MDougM [Public domain], via Wikimedia Commons:
"EscherichiaColi NIAID" by Rocky Mountain Laboratories, NIAID, NIH [Public domain], via Wikimedia Commons:
"Compound Microscope (cropped)" by Acagastya [Public domain], via Wikimedia Commons:
"LEGO City 10159 LEGO City Airport" by Jinko Cruz, licensed under a Creative Commons Attribution License (CC BY 2.0):
"Cell culture (HeLa cells) (261 18) Cell culture (HeLa cells) - metaphase, telophase" by Doc. RNDr. Josef Reischig, CSc., licensed under a Creative Commons Attribution License (CC BY-SA 3.0):
"Bryum capillare leaf cells" by Des_Callaghan licensed under a Creative Commons Attribution License (CC BY-SA 4.0):
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