Learn Biology: Autotrophs vs. Heterotrophs

SALE TODAY: Learn Piano on iOS bit.ly Mahalo biology expert Mary Poffenroth discusses the differences between autotrophs and heterotrophs. Every living organism needs energy to survive and they extract that energy from the food they consume. Based on how they obtain energy, living organisms are classified into two groups: autotrophs and heterotrophs.c The autotrophs can prepare their own food using inorganic raw materials, which they extract from outside sources. Organisms like plants, archaea, protists, algae and a few bacteria belong to this class.c The heterotrophs, on the other hand, do not posses the ability to manufacture their own food. They get the necessary organic nutrients from outside sources. Animals are included in this category.c Features of Autotrophs ——————————————————————— Autotrophs obtain the required energy to create their own food directly from the sun. Autotrophs absorb solar energy and convert it into glucose, or sugar, through a complex process called photosynthesis.c Photosynthesis is the process of transforming light energy into chemical energy, which then gets stored as sugar bonds. In this process, glucose and oxygen are produced using carbon dioxide (CO2), water (H2O) and light energy. Photosynthesis occurs in chloroplast cells with the help of the green pigment called chlorophyll. The chemical reaction can be represented as 6CO2 + 6H2O (+ solar energy)–C6H12O6 + 6O2.c Autotrophs are extremely
Video Rating: 4 / 5

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Comments ( 23 )
  1. Learn Biology: Autotrophs vs. Heterotrophs « Hourly Book
    October 30, 2012 at 2:32 am

    […] Biology education Like this:LikeBe the first to like this. Categories: Uncategorized Comments (0) Trackbacks (0) Leave a comment Trackback […]

  2. Gilo134177
    October 30, 2012 at 2:28 am

    i love this woman !! she makes things soo understandable

  3. thuglife6161971
    October 30, 2012 at 2:29 am

    Thank you!! my text book sucks at explaining this.

  4. missrosamimi
    October 30, 2012 at 3:09 am

    i love this clips help me more than a 70min class thank yu
    keep making them for students like me

  5. ryanlee1217
    October 30, 2012 at 3:12 am


  6. sophialy101
    October 30, 2012 at 3:15 am

    did she just say “thanks for learning”??? this is AWSOME and yeah you’re welcome…

  7. fault03
    October 30, 2012 at 3:20 am

    bitch stop using so many hand gestures!

  8. Zach Mowers
    October 30, 2012 at 4:10 am

    Where’s the fuckin’ sheep, Bro?

  9. TheCrunchycrisp
    October 30, 2012 at 4:41 am

    a big actually a real big thaaannkkkyoooooouuuu . thanks alot 4 teaching me a good bio!

  10. gemogurl96
    October 30, 2012 at 5:06 am

    does she ever change clothes?

  11. Mrmariogamewalkthrou
    October 30, 2012 at 5:23 am

    instead of the autotrophs starting to drool, i did

  12. bakercollegeaaron
    October 30, 2012 at 5:38 am

    I go to you tube to find help with bio and i find a beautiful girl to help me out 🙂 SCORE

  13. cymekonline
    October 30, 2012 at 6:34 am

    this woman didnt explain much about heterotroph :< if my biology teacher wasnt so bad at teaching i wudnt be here in the first place :<

  14. beetlesbum69
    October 30, 2012 at 7:34 am

    so much easier thn listnng to a whole class period!!!!

  15. TheClarkton
    October 30, 2012 at 7:40 am

    My Report Is Now SOLVED!

  16. lamijoe
    October 30, 2012 at 7:40 am


  17. nocturnalwonder2005
    October 30, 2012 at 7:54 am

    Thank you for teaching me in a few minutes what a 3 hour lecture couldn’t teach my brain! 🙂 Life saver during finals week!

  18. sareee2
    October 30, 2012 at 7:55 am

    I thought she was gonna say Mary Poppins!

  19. stella2570
    October 30, 2012 at 8:51 am

    Great video…just what I needed for a quick review!

  20. ladynature5
    October 30, 2012 at 9:29 am

    Very helpful thanks for making the video’s plz continue making them. They cut biology down to size.

  21. MrMama1412
    October 30, 2012 at 9:52 am

    very good

    nice to listening


  22. idontgetno
    October 30, 2012 at 10:04 am

    by this definition, i would infer that the alleged arsenic-based lifeforms in mono lake, california, are understood to be heterotrophic and saprobic

  23. idontgetno
    October 30, 2012 at 10:28 am

    This actually has profound implications for how life develops. I’ve read once on a time all proto-life took nourishment direct from the environment. Then somehow some protein chains took the short cut of gobbling up other proteins chains and voila, predation was born–or something like that.

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