UV irradiation inactivates Cryptosporidium because _______.
A. it leads to a blocking of the action of DNA polymerase and RNA polymerase
B. it blocks the action of lysozyme
C. it denatures the proteins within the microorganism
D. it removes thymine dimers within the DNA
A. it leads to a blocking of the action of DNA polymerase and RNA polymerase
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What is the main reason that a person sitting on the beach with an air temperature of 15 °C loses heat less rapidly than when immersed in lake water at 15 °C?
A) Water conducts heat more efficiently than air does. B) Water evaporates, and heat is lost to evaporation. C) Metabolic heat production is greater in air than in water. D) Air is a poor insulator.
Digger wasps orient using
A. pheromones. B. sight. C. magnetic fields. D. smell. E. sound waves.
Which gas has had the greatest impact on life
on earth?
a. carbon dioxide b. methane c. nitrogen d. hydrogen e. oxygen
What are attached to the central carbon atom in an amino acid?
What will be an ideal response?