Monkeys can certainly survive in North America. The Mystery Monkey of Tampa is proof enough of that. But for them to survive here, they have to get here--the monkeys that were here, the Platyrrhines, aren't the ones to survive in a place like Tampa.
Most people enroll in Part A. when they are first eligible for Medicare because there is no premium for Part A if you have. worked and contributed to Social Security for at least 10 years. However, when you should. enroll in Part B depends in large part on how many employees work for your employer.
If you do not enroll in Medicare Part B during your initial enrollment period, you must wait for the general enrollment period (January 1- March 31 of each year) to enroll, and Part B coverage will begin the following July 1 of that year.