To prevent a shipwreck, submarines determine where objects are positioned under water using sonar, sound waves
This method of detection is similar to a(n):
a. snake using thermoreceptors to locate its prey.
b. shark using lateral line receptors to locate its prey.
c. frog using mating calls to locate a female.
d. earthworm being able to determine its position underground using a statocyst.
e. bat using echolocation to hunt prey.
e
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DNA supercoils that result from underwinding produce ____ supercoils
Fill in the blank with the appropriate word.
A chemist adds a chemical to pure water and there is a 100 fold increase in the concentration of hydrogen ions. What is the best approximation of the new pH value?
A. 0 B. 5 C. 7 D. 9 E. 14
All of the following are reabsorbed by the nephron EXCEPT
A. Na+ and Cl- ions. B. H+ ions. C. amino acids. D. glucose. E. vitamins. F. water.
Snakes, frogs, squirrels, and humans are all classified as being homeothermic.
Answer the following statement true (T) or false (F)