Dr. Asbjorn Folling discovered that the blood of children affected by PKU reacted with ferric chloride to produce a
green color indicating the presence of phenylalanine.
a. True
b. False
False
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Which of the following is NOT a true
statement about the evolution of immunity?
a. immunity evolved before there were multicelled eukaryotes b. nonself recognition evolved about 1 billion years ago c. innate immunity evolved out of adaptive immunity d. ways of indentifying “self” evolved after multicelled eukaryotes evolved e. more than one of these statements is NOT true about the evolution of immunity
What percentage of the earth is covered by
deserts?
a. 7% b. 12% c. 18% d. 20% e. 26%
In the process known as __________, the fate of a cell is influenced by interactions with neighboring
cells. a. determination b. induction c. apoptosis d. differentiation e. pleiotropy
__________cells function when dead
A. Parenchyma B. Sclerenchyma C. Collenchyma D. Phloem