These organisms are classified as a kingdom, Fungi, which is separate from the other eukaryotic life kingdoms of plants and animals. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls.
If you will reach full retirement age in 2015, you may earn up to $3,490 per month without losing any of your benefits. But for every $3 you earn over that amount in any month, you will lose $1 in Social Security benefits.
You can still earn income when you draw Social Security early, there are limits though. In 2014, you can earn up to $15,480 a year and receive your early Social Security payment. Over and above that threshold, your Social Security payout is reduced by $1 for every $2 you earn.