In each trial, you will add an indicator to the mystery food sample. But you will also add the
indicator to a known substance and water. Why is
that important? Check all reasons.
to practice measuring volume using the
graduated pipette correctly
D to match the mystery food sample to a
definite positive result (gelatin, oilets.)
to match the mystery food sample to a
definite negative result (water)
to increase the amount of data.
DONE
No

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.