Roundworms have taken this last body plan and adapted to thousands of environments with it. From microscopic to maybe a meter long, roundworms are just what they sound like-round worms. At one end, they have a mouth, at the other, an anus, with a tube digestive system in between.
Availability of two-factor authentication for Apple ID Two-factor authentication is an extra layer of security for your Apple ID designed to ensure that you're the only person who can access your account, even if someone knows your password.
2Rx8 is a two-sided memory stick. I have 3.5GB of memory in my PC. Two sticks are 1GB ea and 1Rx8, 1 stick is 1GB, 2Rx8 and 1 stick is 512mg, 1Rx8.My Dell Inspiron 530 allows mixing of one-sided and two-sided memory sticks, which is what the 1R and 2R designation means.The R may stand for rank, but not sure about that. have, right in front of me, two sticks of Samsung double-sided DDR3 (one 1G and one 2G), and they are both labeled 1Rx8 PC3 -- and they are both double-sided. 1R means single rank, and 2R means dual rank organization. 1Rx8 has the memory on one side only. 2Rx8 is a two-sided memory stick. blueyes917 said: