In a lab experiment, a scientist injects a rabbit with human blood serum. The serum stimulates the production of antihuman antibodies in the rabbit. The antibodies are collected, and equal amounts are placed into three test tubes. Serum from a chimpanzee is added to the first test tube. Serum from a cow is added to the second test tube. Serum for my fish is added to the third test tube. The scientist then observes the test tubes for clumping, a sign that the antibodies are binding to the serum. She ranks the amount of clumping in each tube on a scale of 1 to 5, with 5 indicating the most clumping and 1 indicating the least clumping.
Tube Number Animal Serum Added Clumping
1 Chimpanzee. 5
2 Cow 2
3 Goldfish 1
Based on this data, which of the following statements is accurate based on the results?
A.) Humans and chimpanzees likely share a common ancestor.
B.) Humans and goldfish are closely related.
C.) Cows and goldfish are closely related.
D.) Chimpanzees are unrelated to humans.