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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

__________cells function when dead

A. Parenchyma B. Sclerenchyma C. Collenchyma D. Phloem

Biology & Microbiology

What percentage of the earth is covered by

deserts?

a. 7% b. 12% c. 18% d. 20% e. 26%

Biology & Microbiology