Which of the following chromosome combinations will produce male birds?
a. XY
b. YY
c. ZZ
d. ZW
c. ZZ
You might also like to view...
Which type of phage always lyses its host cell?
A. Temperate B. Lysogenic C. Virulent D. Prophage
Otitis media is commonly treated with broad spectrum antibiotics, although there is a lot of push-back or pressure against doing this. Why are these drugs given for this condition?
A. The narrow-spectrum drugs are very toxic as opposed to the rather benign broad-spectrum ones. B. No other kinds of drugs and antibiotics can kill the bacteria causing otitis media other than the broad-spectrum class of drugs. C. Fungi are the most common cause of otitis media, and the fungi do not respond well to the narrow-spectrum drugs. D. Otitis media is often caused by a variety of bacteria growing together in a biofilm, and the bacteria often exhibit different susceptibilities to drugs.
Drugs that affect the bacterial cell wall are active only against what type of cells?
A) Gram negative B) Dormant C) Young, actively growing D) Endospore-forming E) Gram variable
The variable region of the antibody is solely responsible the significant diversity of antigen targets
Indicate whether the statement is true or false