What were the instructions to the students taking the exam? What restrictions or instructions?
I'm a teacher in a post secondary institute and all of my quizzes are take-home 'do it at your own time" within a specificed time frame using whatever resources you can find. It allows me to create exams that test more than just rote memorization and I can ask higher level questions that require an understanding of the problem. If you can't understand the question then you won't even know what to google for. I also expect that there will be collaboration between students. This is real life testing, in the real world (job/career), you are asked to solve problems with whatever resources are available to you: google, library, references, friends, colleagues, etc..
There is an added bonus, in that if you don't know the answer, you have the opportunity to research and learn about it. In my assessments, you are assessed on your ability to come up with solution and you have the opportunity to learn while you are doing it.
The final exam is open book, open computer, randomized questions, randomized answers, online with a limit of 3 questions per page in a monitored environment - no friends or colleagues to help you. The exams typically span about 20 pages which makes collaboration very difficult in the limited time frame. The final exam mark is the real indication of your abilities.
Open book exams are always harder than closed book. I've found that the struggling students will do just as poorly in an open book exam as a closed book exam. They figure that all they have to do is look it up in their notes or text. Unfortunately, it is usually the first time they crack open the text and the first time they realize that they were too busy checking facebook, playing world of warcraft, instagramming, etc. to take good notes.
On the lab side, you receive 0% for doing the actual lab work. It triggers an online quiz that tests your understanding of the lab and the lab results. The lab quiz is worth 100% of the lab work. I've found that giving marks for the actual lab work artificially raises the student's grade, it becomes a mark for attendance. I feel that it separates the learning (lab work) from the assessment. I also feel that it is not fair to evaluate someone's ability on the first time that they attempt a procedure or lab. Do the lab, do it right then get graded on how well you understand what happened.