Answer:
C. empirical evidence
Explanation:
Empirical evidence is a type of knowledge obtained through sensory experience, that is, through the process of observation and experimentation. Empirical evidence is often used during the application of the scientific method to test a hypothesis. In the example in question, Peter Grant obtained empirical evidence about birds' biology to verify that his assumptions about their evolution were correct.
Usually cell growth in normal cells are controlled by genes that promotes cell proliferation and also inhibiting them. If a damage occurs in normal cell,the damage is either rectified or apoptosis is initiated. When these genes that control cell proliferation or apoptosis acquires mutations they lose their ability to control their cell division process thereby acquiring uncontrolled cell growth.
The genotype of the offspring would be homozygous recessive. If you used pea pod height for example, the parents' traits would be (T=tall t=short) tt and tt. After you complete your Punnet Square the offspring would be 100% short.
All I know is that it has something to do with the Fetus, they typically run all these tests while the baby is still in the Uturus (I am only aware of this because my mom had a baby 1 year ago)