I understand that plants are the basis of all food chains, but I don't understand really why humans depend on plants.
Sorry if this is confusing.
So - plants manufacture a range of biological molecules, and the animals that eat these make use of these molecules.
But I don't understand how this works, and what is really going on.
I guess the problem I have understanding this is with the food chains.
Can anyone help?
Thank you very much! ^.^
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Why do humans depend on plants for food? watch
- Thread Starter
Last edited by Shostakovish; 07-11-2015 at 11:19.
- 07-11-2015 11:00
- 07-11-2015 11:04
You do understand how a food chain works, right? Not every species is capable of killing other species for food
In our case (human beings), there are those who refuse to eat meat. And things like fibre, vitamins and some minerals which we need in our diet won't come from meat.Last edited by shawn_o1; 07-11-2015 at 11:07.
- Thread Starter
- 07-11-2015 11:20
I am referring to the OCR specification - yeah, I am struggling with food chains. I am confused about energy transfer. I understand that not all humans eat meat.Last edited by Shostakovish; 07-11-2015 at 13:44.
(Original post by Shostakovish)
- 07-11-2015 11:39
I am referring to the OCR specification - yeah, I am struggling with food chains. I am confused about energy transfer. I understand that not all humans eat meat.
Plants get energy from the sun through photosynthesis - they convert light energy into chemical energy which can then be consumed by animals.
I think this is sufficient for GCSE.
- 07-11-2015 11:43
In very, very simple terms:
Humans have to get energy from somewhere.
We cannot get energy directly from the sun.
The sun provides energy for plants.
We eat plants to get this energy from them.