The ________ is a flagellated cell that sweeps water through a sponge's body
A) choanocyte
B) amoebocyte
C) spicule
D) spongin
Answer: A
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The time that it takes for half of a radioactive isotope to change into another stable element is its
A. chemical life cycle. B. half-life. C. activation time. D. life span.
The bile from the liver
A. contains enzymes. B. is stored in the pancreas. C. emulsifies fats. D. is emptied into the stomach.
When the ribosome reaches a nonsense codon, which of the following occurs?
A) a methionine is incorporated B) the polypeptide is released C) a peptide bond forms D) the A site binds to a charged tRNA
You step on something in the yard resulting in a puncture wound that does not bleed freely. Antigens from any microbes that entered the wound will most likely end up in the
A) appendix. B) lymph nodes of the groin. C) lymph nodes of the neck (cervical). D) lymph nodes of the armpit (axilla). E) spleen.