It seems that having a graduate degree should increase your desirability of employment in the current US economy but does having one degree type over another carry any weigh or bias with industry employers?
I would recommend at least a Master's to any student.in any field. It will always give you an advantage. With a Ph.D. however, I think it depends on your field and your career goals. A Ph.D. will certainly carry more weight, but you will often be considered "specialized", making it sometimes difficult to switch between companies or positions. If you have a specific career goal in mind, research what types of jobs are available and what degree requirements are most sought after.
I did contract work at DuPont for 3 years, and they had an employment level system, whereby you could max out at a certain level with a B.S., max out a certain level with a Masters and the top 5 or more branches were only available to PhD's. Many larger companies are structured as such, but most companies small or large will favor the "higher," degree and start you at a higher rate. That being said, there is certainly something to what Suzanne said about "specialization," but each field is different. Experience is also paramount in edging out the competition that is out there for science jobs, so opportunities for internships are certainly a great "audition," for big companies that everyone wants to get into.
Master degree/Phd degree normally are required for research position job that will be located in university /or research comapny.
Engineering company normally request employe with BS degree for example in linkedin if you are accesse to position job request you will find that they want BS degree.