A distinctive feature of spirochaetes is the presence of
A. fimbriae
B. endoflagella
C. helically arranged pili
D. nucleosomes
E. variable surface antigens
Ans: B. endoflagella
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Members of the class Bivalvia:A
have gills that secrete the shell. B. have a mantle that may form pearls. C. are all sessile. D. all have a radula. E. have a broad foot used for locomotion.
Which statement regarding compound eyes is true?
A) They have one light-focusing lens. B) They are poor motion detectors. C) They can provide excellent color vision. D) They can perceive only visible light.
The chemoreceptors located in the aorta that detect change in the blood pH are the _______ bodies.
Fill in the blank(s) with the appropriate word(s).
The honeycomb made by bees is made up primarily of ____.
A. carbohydrates B. nucleotides C. proteins D. lipids E. amino acids