A terrestrial mammal can lose water in all of the following ways except via ________
a. exhalations
b. secretions
c. feces and urine
d. osmosis across the body surface
d
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Which of the following statements about osmoconformers is false?
A. They do not have to adapt to the solute concentrations in the external environment. B. Their internal osmotic pressure matches that of the surrounding environment. C. They often actively regulate the concentrations of particular ions in their body fluids. D. They use less energy to regulate osmotic pressure than osmoregulators. E. Most marine invertebrates are osmoconformers.
Horseshoe crabs have lived in the earth’s
oceans for ___ years.
a. about 4 thousand b. close to 400 thousand c. less than 40 million d. over 400 million e. over 4 billion
How do leeches differ from other annelids?
a. They are aquatic. b. They do not have segmentation. c. They cannot reproduce sexually. d. They do not have a nervous system. e. They do not have setae or parapodia.
Polar, water-soluble hormones usually affect cells by binding to intracellular receptors.
a. true b. false