Anderson replaces Andrew Turnbull who has returned to club duty for Edinburgh.
Glasgow's Richie Vernon faces a busy 24 hours as on his return from Warriors duty in Dublin, he will join the Scotland 7s squad in Edinburgh and fly out to the events in Hong Kong and Adelaide.
Revised Scotland 7s squad (sponsor Murray) to compete in the IRB Sevens World Series tournaments in Hong Kong (28, 29 & 30 March) and Adelaide (5 & 6 April): Scott Forrest (Ayr)* CAPTAIN, Mike Adamson (Glasgow Warriors), Ben Addison (Stirling County)*, Grant Anderson (Ayr)**, Chris Fusaro (Heriot's)**, Roddy Grant (Heriot's)*, Greig Laidlaw (Edinburgh), Scott Newlands (Edinburgh), Colin Shaw (Glasgow Warriors), James Thompson (Heriot's)*, Richie Vernon (Glasgow Warriors), Ali Warnock (Edinburgh)
* = Member of Scottish Rugby's Senior National Academy
** = Member of Scottish Rugby's Junior National Academy and supported by Area Institute of Sport