You start by answering the first question on the list which tells you what to do from there. Pretend your animal was a bird, you might have a key like this:
Does this animal have wings?
yes go to question 2
no go to question 6
Then you just continue until the list doesn't say to do anything else. i.e.:
Is the animal feathered?
yes bird
no go to question 4
Punnet Square (Well that's one way to figure out ways an offspring can come out)
Answer:
study the evolution of life
The correct answer is uncompensated respiratory acidosis.
This is a condition in which decreased ventilation (hypoventilation) increases the concentration of carbon dioxide (CO2) in the blood which causes the pH of blood and to decrease (becomes acidic. Acidosis occurs because restoration of normal acid-base balance is not possible or has not yet been achieved. Uncompensated acidosis is characterized by abnormal pH and abnormal values of PaCO2 or HCO3.