A2 Biology - Ecological efficiency (OCR A Chapter 23.2)

As energy is passed along the food chain through feeding, some of the energy is lost through various ways, hence we say ecological efficiency is never 100%. Here we will discuss why there is always energy loss as we pass from one trophic level to the next and how we can maximise the energy transfer efficiency.(This video is an immediate continuation from the video on trophic levels and biomass.)Please subscribe for more content and comment below to let me know what you think! :)Facebook: BioRach - A-level Biology Online@BioRachProjectmusic:"Dreaming in 432Hz" by Unicorn Heads

Ashley Jessee

“Dad gum good time” lol is that Texas talk? Lol

That's what she said


Best Part 2:30



1 like = 1 hater proved wrong


oh come on this isnt even lazy art, they literally forgot basic anatomy and it hurts my eyes

Wyatt Youngblood

Bone arrow trick shot

Isaac Hobbs


Mikey Fisher

I really want to see a picture of the two of them now


I found the last easter egg but didnt think of as a reference, caus ei was just walking atround the area and elizabeth randomly came to the machine

Benji Moe

Yes Sir.!! Keep it going my brother👍✊💪✌

Candy Kane


Lilly Godwin

There is a girl at my school who went through the same scenario, and she’s the brightest, happiest little second grader ever. But from what I can gather, she doesn’t blame her father, because she realized that yes, it was his actions, but being angry at him wouldn’t change anything. She chose to remember the good memories and not the bad.

Meme God

That office scene though

Mark Saucier

Team Ty

noel McLolzorlor

I didn't know who "Ann" was and the whole time I was like, damn this Ann girl is such a dick.

Starlight GT

Sam, can you please give the food at least 5 mins to cool down before you eat it


which map is that



Film with David Beckham next

Aidan O'Hare

They should've kept the one where the umbrella killed the lights

Funkycomunista Kat

copio o nostalgia SEU CUSAO DO KARALHO


1:20 maybe that's a way of saying "Ezio was legendary." or "Lenardo da Vinci was awesome."

everleigh beech

Who else thought that her boyfriend was cruel and mean and didnt care about her problems but she didnt wanna leave him because he was handsome and popular when they saw the title but then understood after they saw the video

Misty Kindle


Nithish Magician

I Loved Floaty Hair Dryer Chip Shot!!!!4:48

Taiga Tiger

Mellisa Baylon in HES INTO HER is dat u

Asian Lamb


Feitan Portor

What's the music at 1:48?

Oh myy Potato

It's the end of the world because someone called me ugly.

Atmosfer İST


Kaushik Sai

This is something which you and him should sit and talk, not you and the whole YouTube....

Simple Kuishie

1:27 Ladies and gentlemen, I give you Pixar's fog Moses.

Eli the one wheeler Yt


Franklin Madriles

This videos you make are Asome


I'm afraid to learning to drive a car because my uncle died in a car accident

Bethany Collins

I was not expecting this

Come with me, let's make an ocean

Eric Colburn

Go at him early and foul him hard to see if he healed!

Fernando Rojas