You transform bacteria with a plasmid carrying the ampicillin-resistance gene ampR. How would you determine which bacteria took up the plasmid?
A. Bacteria containing the plasmid would be able to produce ampicillin.
B. Bacteria containing the plasmid would be able to grow in the absence of ampicillin.
C. Bacteria containing the plasmid would be able to grow in the presence of ampicillin.
D. Ampicillin-resistance is necessary for the plasmid DNA to get into the bacteria.
E. Bacteria containing the plasmid would be killed in the presence of ampicillin.
Answer: C
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A protein channel linking the cytoplasms of adjacent animals cells is called a(n)_ junction.
A. anchoring B. gap C. tight D. adhering E. microtubular
What is the most reasonable conclusion that can be made from data graphed in the figure?
A. After high mortality early in life, survivorship becomes constant for the rest of life.
B. Survivorship is constant throughout life.
C. After low mortality early in life, mortality increases to a constant rate for the rest of life.
D. After following a constant rate early in life, mortality becomes low late in life.
The famous Greek philosopher Aristotle could be thought of as a taxonomist since he sorted organisms into groups based on a set of shared traits.
Answer the following statement true (T) or false (F)
At what stage of animal development do cells first move from the surface of the embryo into the interior, resulting in a two- or three-layered embryo?
A. zygote formation B. blastulation C. neurulation D. gastrulation E. metamorphosis