Twins produced by embryo splitting ____ in their DNA sequence
a. are identical to one another
b. are identical to the opposite parent
c. must be identical to the same parent
d. must be identical to at least one parent
e. are not identical to each other
a
You might also like to view...
A tracheid is:
A. a gametophyte cell B. a small branch of an insect trachea C. a seed-bearing stem D. a specialized vascular cell E. a reproductive chamber
Why is it not surprising that Staphylococci are the leading cause of wound infections?
A. This genus is readily present as a part of the normal microbiota on most people's skin, so it could easily enter wounds. B. Members of this genus are all particularly virulent and highly capable of causing numerous infections. C. Staphylococci cannot be eradicated from the skin due to multidrug resistance in most members of the genus. Drugs simply don't kill them. D. Staphylococci are capable of a higher degree of spontaneous mutation than most microbes. This makes them able to acquire antibiotic resistance very readily, making them hard to eliminate by pre-surgical antibacterial scrubs. As such, they commonly infect surgical wound sites.
Staphylococci can be divided into pathogenic and relatively nonpathogenic strains based on whether or not they synthesize ________.
A. coagulase B. a capsule C. leukocidins D. catalase
The radioactive decay of 14C produces ____
a. carbon 12 b. carbon 13 c. more carbon 14 d. nitrogen 14 e. oxygen 14