Which of the following organisms would use its skin as a primary respiratory surface?
A) Bird B) Salamander C) Snake D) Lizard E) Turtle
B
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All of the following characteristics are shared between plant and animal development except that in animals, but not plants, _____
A) gene expression in developing embryonic tissues is closely regulated B) orientation of cells and tissues is critical for proper development C) differentiation of cells is directed and maintained by cascades of molecular signals D) once animal cells are differentiated, they cannot de-differentiate and redifferentiate
The most common way to follow bacterial transformation with a plasmid is by
A. manufacturing the bacterial protein. B. conferring antibiotic resistance. C. separating the altered cell surface. D. making the cells immortal. E. altering the physical appearance of the cells.
What is the importance of a cell being able to regulate gene expression?
What will be an ideal response?
The genetic code is translated in groups of ________ bases.
A. four B. three C. two D. five