Cardiac muscle is the only muscle composed of fibers.

Smooth. Cardiac muscle is the only muscle composed of smooth tissue/fibers :)

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the

The name of the instrument that the scientist uses is called a microscope.a microscope is used to view objects which is not visible to the naked eyes