What role do chloride cells play in osmoregulation of marine fish with bony skeletons?
A) They actively transport chloride into the gills.
B) They mediate the movement of salt from seawater through their gills.
C) They are involved in excretion of excess salt.
D) They actively transport salt across the basolateral membrane of the rectal gland.
C
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Which of these is an agent that is used to sterilize the plastic tubing of heart-lung machines?
A. Phenol B. Ethylene oxide C. Mercaptoethanol D. 70% ethanol
Cells very similar to choanoflagellates are
found in: a. Land plants b. Sponges c. Mold d. Bacteria e. None of these
A ddNTP, used often in DNA sequencing, lacks a(n) ________ at the ________ and ________ carbons
A) methyl; 2'; 3' B) carboxyl; 5'; 3' C) OH; 2'; 3' D) OH; 2'; 5' E) None of the listed answers is correct.
How can haplotype blocks provide evidence of selective events for a particular allele?
What will be an ideal response?