A terrestrial mollusc without a shell belongs to which clade?
A) chitons
B) bivalves
C) gastropods
D) cephalopods
Answer: C
You might also like to view...
The RNA "alphabet" used in the genetic code has ____ letters
a. 5 b. 64 c. 4 d. 20 e. 3
Effector B cells secrete antibodies that are ____ those produced by the original B cell from which they arose, which
then ____.
a. identical to; flag antigens for phagocytosis and prevent them from attaching to body cells b. different than; help antigens attach to body cells c. identical; prevent antigens from clumping together to d. different than; present them on the surface of dendritic cells e. in addition to; flag antigens for elimination by urination
Which statement is NOT generally characteristic of parasites?
A. They are specialists and usually are able to affect only one variety of hosts. B. They inflict serious injury and kill their hosts immediately. C. Their presence can weaken a host and make it more vulnerable to predation. D. Their presence can reduce reproductive fitness. E. Plants as well as animals can be parasites.
Which of the following statements regarding membrane protein function is false?
A) Membrane proteins serve as enzymes. B) Membrane proteins act as receptors to molecules like hormones. C) Membrane proteins form junctions between cells. D) Membrane proteins produce phospholipids.