Small, fishlike marine chordates, pointed at both ends with no distinguishable head, in which the notochord runs the entire length of the nerve cord, are called
A. arrow worms.
B. tunicates.
C. acorn worms.
D. lancelets.
E. lampreys.
D. lancelets.
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The ____ gene is the only gene successfully targeted for breast cancer prevention
a. estrogen receptor b. BRCA1 c. estrogen diethylstilbestrol d. BRCA2 e. progestin receptor
A persistent pathogen can evade the host immune system by
A. evolving changes in its envelope structure. B. disrupting complement function. C. producing toxins that inhibit phagocyte movement. D. disrupting immune signaling. E. slowing down its replication.
This organelle acts as a digestive organelle and may also be used to recycle the internal components of a cell.
a. ribosome b. lysosome c. peroxisome d. Golgi apparatus
Balantidium coli uses ________ to penetrate the intestinal mucosa
A) adhesion discs B) flagella C) cilia D) pseudopodia E) suckers