The highest altitude or latitude which will permit trees to grow is called the TREE LINE.
channel proteins
sarcomeres.
A substance that lets electricity flow through it is called a conductor (or sometimes, to be more explicit, it is called an electrical conductor). Substances which do not permit the flow of electricity are called insulators.
ball in socket
yes
It is called a bank permit.
The 50 caliber pistol is the highest pistol which can be purchased without the need for a permit. Some pistol shotguns exist which can be 75 caliber weapons.
A permit needed to found a colony is called a Charter.
It is an insulator.
no ! that is why it is called a permit ! and not a lesince ***In Colorado (Boulder County at least) there is a short written test to obtain a learners permit and an eye exam.
I-95 is also called Crewmen Landing Permit
These are called the fontanelles.
In California, yes you do. It's called a learner's permit, and you need to pass a test to get one here.
freely moveable joints
channel proteins
When people choose their working hours it is called "self employment." The system called "flex time" may permit those employed by others to modify their working hours, within limits, but does not usually permit unrestricted choice.
You cant just go and climb Mount Everest, you need to buy a permit, have all the right gear, join an expedition and most importantly, have lots of high altitude climbing experience.