Among the scyphozoans, the __________ stage is reduced or absent
A. polyp
B. hydra
C. medusa
D. larval
E. juvenile
A
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Which infectious agent risk group would Mycobacterium tuberculosis be placed in?
A. Risk group 4 B. Risk group 1 C. Risk group 2 D. Risk group 3
You are working as a marine biologist off the coast of Mexico. While observing organisms in a tidepool, you find a dramatically colored animal that has not been classified before. Your observations lead you to think that this beautiful animal is apparently a nudibranch, which is a member of the mollusk phylum. However, you are puzzled by one feature that does not fit with the other anatomical and
physiological features of mollusks: stinging nematocysts in the external projections on the back of this animal. Explain how this animal might be correctly classified and what the supporting logic is. What will be an ideal response?
Selective reabsorption of glucose and amino acids occur in the ________ of the nephron.
A. collecting duct B. glomerulus C. distal convoluted tubule D. loop of the nephron (loop of Henle) E. proximal convoluted tubule
Researchers use mitochondrial DNA sequences to study recent evolutionary events because changes occur in mitochondrial DNA more frequently than in nuclear DNA.
Answer the following statement true (T) or false (F)