Experimenters replaced the statoliths in a crayfish statocyst with iron filings and then held a magnet above the animal. Based on your knowledge of the function of statoliths, what would they observe?
A. The crayfish stayed upright.
B. The crayfish lay on its side.
C. The crayfish turned upside down.
D. The crayfish attempted to escape by rapidly swimming backwards.
E. None of these choices are correct.
C. The crayfish turned upside down.
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What is the benefit of adhesion of water to sediment? a. It allows for an increase of oxygen in sediments
b. It provides protection from capillary action. c. It allows organisms to build habitats from sticky sediments. d. It allows microscopic organisms to live in the small spaces between sediment particles.
Osmosis occurs as water can cross the lipid bilayer through specialized channels for water movement called ________.
A. proteins B. membrane pores C. transmembrane carbohydrates D. aquaporins
In microscopy, the term resolution
A) refers to the ability to distinguish fine structure and detail in a specimen. B) is the same as the total magnification of a specimen. C) is improved when longer wavelengths of light are employed. D) is only observed in stained specimens. E) refers to magnification when using the electron microscope.
True or False: Acidophiles maintain a cytoplasmic pH below 5.5
a. TRUE b. FALSE