Doug contributes services but no property to the CD Partnership upon its formation. What are the tax

Question:

Doug contributes services but no property to the CD upon its formation. What are the tax implications of his receiving only a profits interest versus his receiving a capital and profits interest?
Partnership
A legal form of business operation between two or more individuals who share management and profits. A Written agreement between two or more individuals who join as partners to form and carry on a for-profit business. Among other things, it states...