https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/cell-structures-and-their-functions/v/introduction-to-the-cell 2024-05-06T19:22:43.24334365Z Introduction to the cell Cells are the most basic unit of life. All cells have a membrane that separates them from the outside world. Although cells are small, they are not simple. Cells contain different components, such as the cytoplasm, ribosomes, and genetic information in the form of DNA. Sal Khan video https://cdn.kastatic.org/googleusercontent/oJzMb8uFcN9RVSjYAzgspVKaATNhy5W3RvgP7f7VURoD28h2uR7JZ1EPk1bW-5e_OOUXB88nBpw0LeCg6V3APRq--w Introduction to the cell Cells are the most basic unit of life. All cells have a membrane that separates them from the outside world. Although cells are small, they are not simple. Cells contain different components, such as the cytoplasm, ribosomes, and genetic information in the form of DNA. https://cdn.kastatic.org/ka-youtube-converted/5KfHxF6Vhps.mp4/5KfHxF6Vhps.mp4 352 Cell Structure and Micro-organisms https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:cell-parts-and-functions/v/cell-parts-and-their-functions 2024-01-04T21:34:20.525650636Z Cell parts and their functions Within cells, special structures are responsible for particular functions. For example, mitochondria help release energy that the cell can use for other tasks, and the nucleus contains the genetic information. The cell membrane forms the boundary that controls what enters and leaves the cell. In plant cells, chloroplasts enable photosynthesis and the cell wall provides structure. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/e8f3dd93-e6ed-4a18-9eb6-ccba71d3314c_1280_720_base.png Cell parts and their functions Within cells, special structures are responsible for particular functions. For example, mitochondria help release energy that the cell can use for other tasks, and the nucleus contains the genetic information. The cell membrane forms the boundary that controls what enters and leaves the cell. In plant cells, chloroplasts enable photosynthesis and the cell wall provides structure. https://cdn.kastatic.org/ka-youtube-converted/TVxtlfUwIY0.mp4/TVxtlfUwIY0.mp4 254 Cell Structure and Micro-organisms https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/cell-structures-and-their-functions/e/cell-structures-and-their-functions-exercise 2026-04-05T18:28:15.377289243Z Cell structures and their functions Test your knowledge of cell structures and their functions! Ashley Mucha exercise https://www.khanacademy.org/science/mh-grade-9-bridge-course-science/x109ad1e366099af5:living-world-and-classificaiton-of-microbes/x109ad1e366099af5:classification-of-microorganisms/v/friend-or-foe-understanding-microorganism-middle-school-science-khan-academy 2025-01-08T02:29:38.725066879Z Microorganisms: Friend or Foe? Learn how helpful microorganisms contribute to soil fertility, food production, antibiotics, vaccines, and even environmental cleanup. At the same time, discover how harmful microorganisms can spoil food and cause diseases. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Microorganisms: Friend or Foe? Learn how helpful microorganisms contribute to soil fertility, food production, antibiotics, vaccines, and even environmental cleanup. At the same time, discover how harmful microorganisms can spoil food and cause diseases. https://cdn.kastatic.org/ka-youtube-converted/LqL492kifkU.mp4/LqL492kifkU.mp4 372 Cell Structure and Micro-organisms https://www.khanacademy.org/science/revision-term-2-tg-biology-class-8/x04828215b460a495:week-2/x04828215b460a495:the-world-of-microorganisms-part-i-ii/v/classification-understanding-microorganism-middle-school-science-khan-academy 2025-01-08T02:29:38.725066879Z Classification of Microorganisms Discover how microorganisms are grouped into categories like bacteria, fungi, algae, protozoa, and viruses based on their shape, structure, and life processes. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Classification of Microorganisms Discover how microorganisms are grouped into categories like bacteria, fungi, algae, protozoa, and viruses based on their shape, structure, and life processes. https://cdn.kastatic.org/ka-youtube-converted/Q-eLlmnf72g.mp4/Q-eLlmnf72g.mp4 444 Cell Structure and Micro-organisms https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:aquatic-and-terrestrial-pollution/x0b0e430a38ebd23f:pathogens/v/pathogens-and-the-environment 2022-09-07T01:03:50.067296221Z Pathogens and the environment Pathogens, such as the pathogen that causes malaria, adapt to take advantage of new opportunities to infect and spread through human populations. As equatorial-type climate zones spread north and south into what are currently subtropical and temperate climate zones, pathogens, infectious diseases, and any associated vectors are spreading into these areas where the disease has not previously been know to occur. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/6a05da7e-56bf-4652-9012-07636c07e5f0_1280_720_base.png Pathogens and the environment Pathogens, such as the pathogen that causes malaria, adapt to take advantage of new opportunities to infect and spread through human populations. As equatorial-type climate zones spread north and south into what are currently subtropical and temperate climate zones, pathogens, infectious diseases, and any associated vectors are spreading into these areas where the disease has not previously been know to occur. https://cdn.kastatic.org/ka-youtube-converted/wyd0ozxbWkk.mp4/wyd0ozxbWkk.mp4 277 Cell Structure and Micro-organisms https://www.khanacademy.org/science/revision-term-2-tg-biology-class-8/x04828215b460a495:week-2/x04828215b460a495:the-world-of-microorganisms-part-i-ii/e/lo-5-1-micro-organisms-fundamentals 2026-04-06T02:41:58.374508961Z Micro-organisms (Fundamentals) Let's solve some problems to better understands some fundamental properties of micro-organisms. Aakash Bagga exercise