Lions don't eat grass, so the question isn't applicable. Besides, this is just like the question asked about a cow eating so much grass and then asking how much of the energy from the grass can be usable by humans? It's immeasurable because food gets converted into energy in different ways for different animals, and to think that cutting out the middle-man would help bridge the gap between the energy lost is one that doesn't truly understand how it all really works. Humans aren't built nor meant to eat grass, nor are lions.
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grass is a producer because it lives off of the sun. Which is the source of all energy, and other things feed off of grass. the grass just makes the suns energy usable for other organisms
producer
Grass takes energy from the sun through photosynthesis. Therefore, the sun provides energy for grass.
A flock of sheep are grazing in a field. As they eat, the sheep break down the molecules in the grass, which releases energy. Which form of energy is stored in the grass?
plasticfrom grass
Grass courts.
Grass contains carbon which was taken out of the atmosphere by photosynthesis using the Sun's energy. The grass can be burned to recover the energy as heat.
Chlorophyll converts the sun's energy within the grass so the grass can grow. The, cows convert the grass into energy by digesting the grass.
Grass is eaten by herbivores plant. Hence, it loses the energy.
Herbivores get energy from grass more easily.