Dirt would the the nutrition to the plants.
The sun would provide food for the plants.
Mushrooms would break down dead things.
Small animals would eat the food then defecate to provide more nutrients. (Caterpillar)
Plants get food from the sun, and provide for themselves such as a plant like a tomato or green been.
Tissues are groups of cells that work together to form a specific function.
An example of a tissue is muscle tissue. There are three types of muscle tissue: cardiac, skeletal, and smooth.
These tissues are comprised of cells which work together to form a function - in the case of cardiac muscle tissue, these cells work together to keep the heart pumping blood (to keep it simple).
Answer:
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Explanation:
Plant cells have cell walls but animal cells don't. That's one of the things that make their structures different.