Problem:

Symbionts play a critical role in the nutritional success of some plants. What are those symbionts doing for the plant? 2. Why is soil necessary for plant nutrition and survival? 3. A seed is a complex and dynamic plant reproduction structure. List the parts of the "average" seed and the function of each of those parts in ensuring the success of the seed. 4. Plants have no central processing area (i.e. a brain) that helps them recognize and respond with their environment. How then do plants control their processes (e.g. growth, reproduction timing, etc.)? 5. Briefly describe how plants can tell time. 6. Look at the plant "immune system."

Required:

Question: Compare the ways that the plant fights off disease to the way that humans fight off disease.

Could someone explain this to me?