Because arthropods are characterized by bilaterally symmetric  segmented bodies, an exoskeleton made from chitin, and joint  appendages, pretty much any characteristic otherâ¦ than these might  disqualify the organism. Mammals for example, with their internal  skeleton would be disqualified.
Medical Expense Deduction. You can deduct medical mileage as part of your overall medical expense deduction. The IRS limits the medical deduction to the amount of medical expenses in excess of 7.5 percent of your Adjusted Gross Income.
How Much of the Expenses Can You Deduct? You can deduct on Schedule A (Form 1040) only the amount of your medical and dental ex-penses that is more than 7.5% of your AGI (Form 1040, line 38).In this chapter, the term â7.5% limitâ is used to refer to 7.5% of your AGI. The phrase âsub-ject to the 7.5% limitâ is also used.