One option is that the samples run through gel electrophoresis is too small to be recognized (shorter strands of DNA travel further through the gel and larger strands travel shorter). The other option in that the restriction enzyme did not cut the DNA in the proper spot or there was a mutation in the bases that allowed for a mistake in the cutting; that is why there are 800 base pairs in one sample (that's a lot) An example of a mutation is that lets say the restriction enzyme was supposed to cut at the second G in GGACC. But if that G was turned into an A, then the restriction enzyme wouldn't cut there.
For number 5, you might have 800 because of the restriction enzyme cutting it wrong, a mutation that allowed for the cutting to not take place, or a fault in the sample taking.
I am an AP Biology student right now in Wisconsin. I just finished that worksheet this morning :) anymore questions just hit me up
        
             
        
        
        
Answer:
The difference  is  that the Triceps is a arm muscle and Biceps is a muscle of the arm. While the biceps crosses both the shoulder and elbow joints
Explanation:
 
        
             
        
        
        
A gamete is a haploid cell, a cell with only one pair of chromosomes. Say the skin cell of a human has 46 chromosomes (2 pairs), a gamete would have 23 chromosomes (1 pair) because gametes are sex cells. When a sex cell (Egg and sperm) come together, they together will create a dipole cell (46 chromosomes, 2 pairs). 
        
                    
             
        
        
        
To create enviromental laws to protect natural resourcesfor human consumption.....i think
        
             
        
        
        
Answer:
The correct answer is the option B: Fluid; Crystallized. 
Explanation:
To begin with, in 1963 the psychologist Raymond Cattell introduced the concepts of both Fluid intelligence and Crystallized intelligence in where he explains that both are derived of the General intelligence. The first one refers to the ability of solve novel reasoning problems and is related to the capacity of important skills such as comprehension, learning and more. And the second one, the Crystallized intelligence refers to the ability of learn procedures and more technical knowledge about certain topics reflecting the effects of experience about that.