All vertebrates except ____ have a two-circuit circulatory system.
A. fish
B. mammals
C. birds
D. amphibians
E. reptiles
Answer: A
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The ratio of different-colored fluorescent dyes in microarray can be used to infer information about:a
patterns of gene expression only. b. drug activity only. c. the identity of disease-causing genes only. d. patterns of gene expression and also drug activity only. e. patterns of gene expression, drug activity, and the identity of disease-causing genes.
Intestinal bacteria are necessary for plant-eating animals to digest
A) cellulose. B) lipids. C) proteins. D) carbon dioxide. E) nitrogen.
Na+ ion concentrations are higher outside the cell than inside the cell. What type of transport system is required to move Na+ ions in and out of the cell?
A. Na+ moves into the cell by facilitated diffusion and can not move out of the cell B. Na+ moves in and out of the cell by active transport C. Na+ moves into the cell by facilitated diffusion and out of the cell by active transport D. Na+ moves in and out of the cell by passive diffusion E. Na+ moves into the cell by active transport and out of the cell by facilitated diffusion
Compare and contrast the reagents and functions of negative staining versus positive staining.
What will be an ideal response?