Yersinia pestis
What will be an ideal response?
is usually transmitted by a Flea Vector
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Because more than one codon can specify the same amino acid, the genetic code is said to be
A. repetitive. B. redundant. C. reverse. D. degenerate. E. wobbly.
Which two groups of amniotes shows the closest relatedness?
a. Birds and turtles b. Birds and crocodilians c. Mammals and snakes d. Crocodilians and lizards e. Mammals and birds
A decrease in blood glucose triggers action by the _____ stimulated by _____
a. liver; an increase in glucagon b. liver; the absence of insulin c. liver, muscles, and fat; an increase in glucagon d. liver, muscles, and fat; the absence of insulin e. hypothalamus; the breakdown of sugar
Insulin can activate lipid synthesis in adipose cells and block breakdown of glycogen in the liver. How could one hormone have different effects on different organs?
A. Adipose and liver cells may have unique signal transduction pathways activated by insulin. B. Adipose cells do not express the insulin receptor while liver cells do. C. Adipose and liver cells may contain different transcription factors that regulate the expression of different genes. D. Adipose and liver cells may express distinct insulin receptors.