Which of the following avian diseases does not typically show signs but birds still shed the disease?
a. knemidokoptes c. PBFD
b. egg bound d. psittacosis
D
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Which photoreceptor cells are more numerous?
A. Rods B. Cones
Accommodation
a. is the processes focusing the visual image on the retina. b. occurs in fish by moving the lens either forward or backward. c. can be accomplished by changing the fluid volume in the optic chamber . d. only two of these. e. all three of these.
After donating 0.5 liter of blood, one would expect
A) an increased reticulocyte count. B) an increased platelet count. C) an increased erythrocyte count. D) an increased neutrophil count. E) increased levels of clotting factors.
Hydrogen bonds are important for all of the following except:
A. producing surface tension in water B. helping hold DNA strands together C. helping atoms give up or receive electrons D. helping hold a protein structure together