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.
3FF stands for 3rd Form Factor. A SIM card that is physically smaller than a traditional (2FF) SIM, but larger than a nano-SIM (4FF). See: SIM. The electric contacts and circuitry of a micro-SIM are identical to that of a larger SIM card; the plastic part is simply smaller. A micro-SIM can be used in a larger SIM card slot with an adapter.