George C. Deutsch, the young presidential appointee at NASA who told public affairs workers to limit reporters' access to a top climate scientist and told a Web designer to add the word "theory" at every mention of the Big Bang, resigned yesterday, agency officials said.

Mr. Deutsch's resignation came on the same day that officials at Texas A&M University confirmed that he did not graduate from there, as his résumé on file at the agency asserted.

Officials at NASA headquarters declined to discuss the reason for the resignation.

"Under NASA policy, it is inappropriate to discuss personnel matters," said Dean Acosta, the deputy assistant administrator for public affairs and Mr. Deutsch's boss.

The resignation came as the National Aeronautics and Space Administration was preparing to review its policies for communicating science to the public. The review was ordered Friday by Michael D. Griffin, the NASA administrator, after a week in which many agency scientists and midlevel public affairs officials described to The New York Times instances in which they said political pressure was applied to limit or flavor discussions of topics uncomfortable to the Bush administration, particularly global warming.