# lines while importing .dae files

I am new to blender. I tried to import a .dae file but there seems to appear line like objects (and circles at the end of it) starting out from the axis. Can you tell me what they are and can it be removed?

But when I open the same environment (.dae file) in another application, I get a proper environment.

You can disable that these lines are drawn. Press N while your mouse is in the 3D viewport to bring up the Properties shelf. Then scroll down to display and disable Relationship Lines:
Alternatively you can activate Only Render. Then anything that is not mesh data will be hidden, except for the transform widget.