Which one of the following statements about the phylum Brachiopoda is false?
A. Brachiopods are often misidentified as bivalves.
B. Brachiopods were much more diverse in the past.
C. As in bivalves, the valves in brachiopods are lateral (left and right) to the body axis.
D. Most brachiopods are sessile (attached).
E. The lophophore resides within the brachiopod's shells.
C. As in bivalves, the valves in brachiopods are lateral (left and right) to the body axis.
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Suppose a scientist is interested in studying DNA regulatory elements. What should she prepare first?
a. cDNA library b. genomic library c. transgenic mouse d. Northern blot e. DNA chip
Unlike xylem, phloem is made up of __________
A. cells that transport solutes B. cells that still have organelles C. cells that run the length of the plant
Which of the following is not a mechanical vector?
A. Fomite B. Human C. Fly D. Flea E. Fomite AND human
The process by which cell lineages become specialized in composition, structure, and function is referred to as
a. apoptosis. b. cytoplasmic localization. c. differentiation. d. embryonic induction.