Observation: I am in the lab timing how long it takes to boil 100 mL of water in a beake over a Bunsen burner. I observe it takes 5:15 mins to boil the water. I want to get the
most accurate answer possible so I repeat the test again making sure everything is the
same. This time it takes 7:05 mins to boil the water. I think this is unusual so I repeat
the experiment a third time and it takes 5:20 mins.
What could we infer about the differences in the times observed?

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)