POPULATIONS IN ECOSYSTEMS - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH

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  • Опубликовано: 1 дек 2024

Комментарии • 25

  • @AlevelBiologyHelp
    @AlevelBiologyHelp  4 года назад +22

    00:57 = Important definitions
    02:23 = How abiotic factors affect population size
    03:27 = Interspecific competition
    04:33 = Intraspecific competition
    05:42 = Predation
    08:15 = Estimating population size: quadrats
    09:53 = Estimating population size : belt transects
    10:54 = Ways of estimating population size using a quadrat
    11:42 = Mark-release-recapture
    14:21 = Primary succession
    17:18 = Conservation of habitats
    18:58 = Exam questions and mark schemes

    • @spine747
      @spine747 4 года назад +1

      thank you so much! I am WJEC so I hope this helps :)

  • @cdpworkouts7518
    @cdpworkouts7518 4 года назад +25

    i did not expect your videos to be this helpful but they are, thank you.

  • @phoenixraven2779
    @phoenixraven2779 4 года назад +10

    Thanks for this, it's amazing :)

  • @margotc2780
    @margotc2780 3 года назад +46

    this makes me wanna throw up & cry

  • @RAHMANISHMIL
    @RAHMANISHMIL 2 года назад +3

    Hi, miss does your lesson content hit all the specifications point in the AQA spec. i just want to confirm so that i don't want to learn things that I might not be assessed on if you get what I mean.

  • @seokjinkim9604
    @seokjinkim9604 2 года назад +8

    Thank you so much! I just got an A for A-level biology

    • @AlevelBiologyHelp
      @AlevelBiologyHelp  2 года назад +3

      Wow well done you!

    • @seokjinkim9604
      @seokjinkim9604 2 года назад +2

      @@AlevelBiologyHelp thanks! it was very helpful. can I ask if you are also planning to do videos on A-level chemistry?

    • @eems4565
      @eems4565 2 года назад +1

      oh my god did u get the A for the actual exam or for mocks ?? anyway,, congrats !! ♡♡ any study tips for a fellow student in need 😭☝️

    • @seokjinkim9604
      @seokjinkim9604 2 года назад +2

      @@eems4565 All I did was to make study notes from videos on this channel, and then did a lot of past papers like 2 weeks before the exam. I didnt even use textbooks since it had too much useless info that wont even come up in exam lol

  • @lizzy2804
    @lizzy2804 Год назад +1

    this was amazing

  • @daniellucas3907
    @daniellucas3907 Год назад +2

    Thankyou so much!!!

  • @pianosnotacrime8891
    @pianosnotacrime8891 4 года назад +3

    Thank you! Very helpful

  • @gracekaye3319
    @gracekaye3319 3 года назад +3

    Do we need to know about secondary succession, I believe it wasn’t covered in the video

  • @lovelyactivityclasses3031
    @lovelyactivityclasses3031 4 года назад +5

    Awesome

  • @danghali9041
    @danghali9041 3 года назад +2

    legend

  • @redainaafridi4133
    @redainaafridi4133 4 года назад +2

    Hello, thank you for the video,
    I’m just a bit confused with the question on how assumptions made on the proportional sampling differ from MRR. I thought you said that in MRR (or in the kerboodle textbook) it says that with MRR you can make the assumptions that your marked sample was thoroughly distributed. But you have wrote that that isn’t an assumption with MRR so I’m a bit confused.

    • @AlevelBiologyHelp
      @AlevelBiologyHelp  4 года назад +5

      Hi! I wasn't supposed to say in the video that the assumption is that they have time to distribute evenly, woops! The assumption is just that they have enough time to distribute, but not necessarily evenly i.e. there could be more organisms in one area of a field. So there is no assumption that organisms distribute themselves evenly, if that makes sense?

  • @jasmin4518
    @jasmin4518 3 года назад +5

    3:47 its a leopard :)

    • @AlevelBiologyHelp
      @AlevelBiologyHelp  3 года назад +3

      Haha ok thank you, I clearly need to brush up on my big cat knowledge!