Biotic and Abiotic Factors

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  • Опубліковано 13 гру 2024

КОМЕНТАРІ • 89

  • @lexrunner408
    @lexrunner408 10 років тому +111

    This man is the guru of the ap biology community

  • @sierralobo7163
    @sierralobo7163 9 років тому +24

    Thank you Mr.Andersen! You're the main person A.P. Biology class goes to for help. Your videos are amazing and easy to understand.

  • @reetta1142
    @reetta1142 3 роки тому +2

    We have been watching these videos in a Finnish upper secondary school on two biology courses which we're able to take in English. The videos have helped a lot not just with learning about the different aspects of biology but also with the learning of the different biological concepts (in English) and how to use them to explain these things in English. Thank you for these videos!

  • @almoststatic6294
    @almoststatic6294 3 роки тому +4

    Our class teacher referred us to this video in our lesson to make notes, and I'm not complaining. This is a great video and covers everything I need to know in a great deal of depth, especially since I am a triple science student, this really has helped me. Please keep doing what you're doing; it does have an affect on us and it doesn't go unnoticed.

  • @mastaan2301
    @mastaan2301 9 років тому +31

    it's be nice if he could summarize the lesson at the end because i use his videos to write notes and study but i cant write down everything he says. i seem to have trouble finding the key points....

  • @TheSalHanen
    @TheSalHanen 11 років тому +2

    Like the other dude said "your just explained that to me in a way I can understand" that was awesome man.

  • @Sweetcupcakes23
    @Sweetcupcakes23 12 років тому +2

    one of the best teachers so farr!!!!! thank u so much

  • @Neeboopsh
    @Neeboopsh 13 років тому +2

    as always, fabulous work mister anderson

  • @Okaygrandma
    @Okaygrandma 10 років тому +14

    Thank you for this video it helped me alot with my studies

  • @gigibunny
    @gigibunny 12 років тому +2

    you just taught me so much! You have no idea ! i felt like my biology professor was teaching us all this in a very indirect way and I couldn't understand it but you just made something that was so abstract to me concrete ;p thank youuuuu !!!!

  • @nvmsviewsofyouth
    @nvmsviewsofyouth 12 років тому +2

    Can you tell me what programs/applications you used to shoot this video? Thanks so much!

  • @cristinalaskar8829
    @cristinalaskar8829 3 роки тому +1

    Thank you for this!! So... How do we alter the biofilm scenarios, say in one's mouth? I know some folks who cannot figure out their sinusitis situation!!! I'd love to be able to share - specifically something natural! Though, I'll figure out the natural if you tell me how to affect the biofilm...

  • @annaodibo2006
    @annaodibo2006 3 місяці тому

    A well detailed video
    Thanks man,❤

  • @RotatingMagnetGuy
    @RotatingMagnetGuy 9 років тому +13

    Welp I guess it's time to go brush my teeth now *shudders*

  • @alamara221
    @alamara221 8 років тому +4

    why did the elk population go up if wolves are feeding off of them?

    • @diaverna
      @diaverna 8 років тому

      Amir Alamara Ikr, but maybe they started mating more or something.

    • @TwoAwesomePeopleTAP
      @TwoAwesomePeopleTAP 7 років тому

      Amir Alamara I think it'd likely be a combo of multiple things.
      - As lotus said previously, it seems possible that the elk reproduced more to counter the increased mortality from predation.
      - they likely decreased in number at first, then once natural selection allowed those that had traits better suited for an environment with predators to start increasing in frequency by reproducing successfully, the elk population increased until the wolves adapted to counter the elks' traits. Examples: better antlers or hooves to defend with, faster metabolism, legs a better length to flee; a lack of evolutionary pressure from predation meant that, once predation DID start anew, some of the traits present would be detrimental to survival and selected out, so the population would (mostly) expand from the now-fit traits.
      - as mentioned above, there was likely a decline in elk population at first. This would have allowed the previously-dwindling populations of the elks' food to recover, and the elk population would increase again as its food sources did.
      Hope this was insightful!
      - gryphongirl

    • @javierhenderson3543
      @javierhenderson3543 7 років тому +1

      Since the wolf population decreased, the elk population increased. It seems that he messed up on his wording.

  • @greciagarcia5016
    @greciagarcia5016 4 роки тому

    On what app did you do the video?

  • @Zinckanator
    @Zinckanator 11 років тому +6

    3:27 ew that nasty stuff is on our teeth.

  • @Rosaliepayne
    @Rosaliepayne 10 років тому +8

    He is a lifesaver :)

  • @mohammadasim1761
    @mohammadasim1761 6 років тому

    Very nice

  • @eazyninja6190
    @eazyninja6190 3 роки тому +1

    Wow such good vid

  • @msmcmuffin586
    @msmcmuffin586 12 років тому +1

    HI NARA!!

  • @mattelumacas8129
    @mattelumacas8129 2 роки тому

    Do you have a math lesson?

  • @grotch9257
    @grotch9257 5 років тому +7

    Watchin this in AP bio rn I hate my life

  • @wynniel2891
    @wynniel2891 6 років тому +1

    thanks so much!!!

  • @Smitty231009
    @Smitty231009 9 років тому

    Where can I find the video worksheets?

  • @kenzy_2289
    @kenzy_2289 Рік тому

    when everyone is commenting about AP bio but your AP environmental science teacher sent you

  • @lorcresiakonopasek9793
    @lorcresiakonopasek9793 2 роки тому

    The petraphyde forest is scared solid? ي

  • @noobyrice2346
    @noobyrice2346 3 роки тому

    this is cool
    😃😃😃

  • @knepsis
    @knepsis 11 років тому

    same here

  • @whiteoakpublishing
    @whiteoakpublishing 11 років тому +2

    Great video...except isn't it pronounced "coyote" with a hard 'E' sound at the end?

    • @cherrybomb2015
      @cherrybomb2015 5 років тому +4

      this is such an old comment, but coyote has a variation of pronunciations depending on the region!

  • @SamWor
    @SamWor 4 роки тому

    mr cantrells class where you at

  • @JaZzieL0
    @JaZzieL0 5 років тому

    No entiendo nada pero tengo que verlo...

  • @Tundratiesfishingco
    @Tundratiesfishingco 3 роки тому

    lynx don't just feed on hares. There feed on rodents, too.

  • @prestonnguyen572
    @prestonnguyen572 11 років тому

    you spelled Barro* wrong dawg....

  • @AlwaysLoudAA
    @AlwaysLoudAA 11 років тому

    Mrs. Huisinga's class! What UP!?!

  • @jellyfish5725
    @jellyfish5725 8 місяців тому

    bro has been mewing since 2011😍😍😍

  • @abelilas6835
    @abelilas6835 10 років тому

    Great

  • @lillyious
    @lillyious 12 років тому

    thxs

  • @xiiixiiih.16
    @xiiixiiih.16 2 роки тому

    🍎

  • @brutty100
    @brutty100 11 років тому

    Mrs Browns class mang

  • @calebbalcita6568
    @calebbalcita6568 4 роки тому

    In Northern North America lol.

  • @kevinfeng6700
    @kevinfeng6700 7 років тому

    Kai-yotes

  • @KiiDSkiiLLz
    @KiiDSkiiLLz 6 років тому

    Mrs.Wisneski class anyone

  • @Sp0okeh
    @Sp0okeh 9 років тому

    gud vid

  •  Рік тому

    This video is inaccurate when describing the main diet of Gray Wolves and contributing to the spread of misinformation, which in turn leads to an imbalance in ecosystems. The main diet of Gray Wolves is in fact, not cattle, but their natural food source, elk, among other mammals. By suggesting that Gray Wolves feed mainly on cattle you are emboldening individuals to kill wolves when wolves are desperately needed in our ecosystems. The reality is that wolves have a minimal impact on the cattle industry, but the industry continues to insist otherwise despite evidence to the contrary. If you are going to make videos, please try to ensure they are factually correct.

  • @KarliG1998
    @KarliG1998 12 років тому +1

    omg i understand now...

  • @SNORLAXisBAWS
    @SNORLAXisBAWS 11 років тому

    hey preston who do you think i am

  • @jenniferhulak1614
    @jenniferhulak1614 Рік тому +1

    Liberal.

  • @abelilas6835
    @abelilas6835 10 років тому

    Mr Dwyer

  • @Stevester117
    @Stevester117 11 років тому

    MS. BRYSON'S CLASS!!!!!!

  • @lorcresiakonopasek9793
    @lorcresiakonopasek9793 2 роки тому

    Pollyanna are so cute , but how can we get them to somewhere safe?

    • @lorcresiakonopasek9793
      @lorcresiakonopasek9793 2 роки тому

      Every life and UN life you explain are so cute.
      Are they dropping off because there eating each other

  • @지뉴-n1s
    @지뉴-n1s 5 років тому +1

    How many people are watching this video just because of their biology class?

    • @guoxin3153
      @guoxin3153 4 роки тому

      middle school because of my science class

    • @songnghi1315
      @songnghi1315 4 роки тому

      Oh me haha, i have a biology class online today and my teacher required us to watch this.

  • @MetalManWario
    @MetalManWario 11 років тому +1

    watching dis for class ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhggggggggggggggaaaaaaahhhhhhhhhhh >:|
    stop babbaling already

  • @noah_a_j4615
    @noah_a_j4615 3 роки тому +1

    Bruh global warming increases and decreases across years lmao this guy is a teacher?

  • @linjas123
    @linjas123 11 років тому

    63 Days!

  • @Okaygrandma
    @Okaygrandma 10 років тому +1

    You are all so little minded and immature. As if anything you say matters lol this video is educational

  • @DeathThemself
    @DeathThemself 12 років тому +2

    Brilliant! Thank you so much!