A student is conducting an investigation to find out which food his dog likes best. Which is the dependent variable in his investigation

the dependent vaiable would be the dog. the independent would be the type of food you are using. the independent vaiable is something you can change and you can not change the dog.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.