Who is/are the common ancestor (s) of individual IV-1?
a. I-1
b. I-1 and I-2
c. I-2
d. I-2 and I-3
e. I-1, I-2 and I-3
Answer: c. I-2
You might also like to view...
Differentiation occurs only in multicellular organisms
Indicate whether the statement is true or false.
Which of the following mediators would not be categorized as a cytokine?
A. A protein that is released by a bacterial cell following phagocytosis B. A protein that stimulates hematopoiesis C. A protein that regulates adaptive immunity D. A protein that regulates innate resistance mechanisms
Water has fewer hydrogen atoms than lemon juice and a pH of around 7. Predict what will happen to the pH level of water when lemon juice is added.
A. The pH will become higher. B. The pH will become lower. C. The pH will remain the same. D. There is not enough information to decide.
Which is a defining characteristic of adaptive immunity?
a. nonspecificity b. diversity c. short-lived responses d. self recognition e. reliance on surface barriers