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It depicts the flow of energy from one organism to another. eg.. when a deer eats grass , energy flows from grass to deer. subsequently when a lion eats the deer, the energy then flows from the deer to the lion. hence the arrow mark should be from grass to deer to lion.
From eating grass and raspberries
To do this simply you need to trace back the food source of an animal. For example: lion eats deer, deer eats grass, grass uses sun's energy to produce food via photosynthesis.
The deer eat the grass. The grass gets no benefit from the deer. This is called commensalism.
The deer would be called a consumer because its eating the grass
lions eat deer and deer eat grass.
herbivore
When things eat other things, only 10% of the original energy moves up. Let's say that grass has 100% energy an a deer eats that grass. The deer only has 10% of the energy that the grass had. Now a bear eats our deer. Since the bear only gets 10% of the energy that the deer had, it is getting 1% of the original energy from the grass.Now if you eat the bear and get 10% of the energy that ithad, you'd be getting .01% of the original energy from the grass.Now let's go with the assumption that you can eat grass. Remember how the grass has 100% energy? Well now you've taken the place of the deer. You get 10% of the grass' energy.Eating the bear, a second level consumer, gives you only .01% energy while eating the grass gives you 10% energy.However, human bodies require certain proteins that only meat provides, which is why vegetarianism/veganism and all related food plans which exclude meat aren't always the best for every person. It's why we're herbivores- we can eat plants, which provide more energy since they get theirs directly from the sun; and we can also eat meat, which provides the necessary nutrients for muscle growth and other characteristics relating to good health.tl;dr?For every pound of beef, six pounds of grain were used.
grass
Producer (grass) and First Level Consumer(deer).
Deers feed on grass
Swamp deer are herbivores. The swap deer eat grass and plants that grow in the shared ecosystem with the animal.