A virus differs from a bacterium in that a virus ________
A) develops resistance to antibiotics B) causes pneumonia
C) does not have DNA or RNA D) is not a living organism
Answer: D
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Which group of animals has one-way flow of air through its lungs, whereas all the others have tidal flow?
A. mammals B. amphibians C. birds D. reptiles
In some plants, flowering is a _____ response
a. phototropic c. photoperiodic b. gravitropic d. thigmotropic
How will the destruction of forests affect the amount of carbon dioxide in the atmosphere?
1.It should have no effect. Carbon dioxide is put in the air by the burning of fossil fuels. 2.There will be fewer plants to absorb carbon dioxide through photosynthesis, so carbon dioxide can build up in the atmosphere. 3.It should reduce the amount of carbon dioxide produced since there will be fewer organisms undergoing cellular respiration. 4.Oxygen and carbon dioxide are balanced. If you increase carbon dioxide by plant removal you will decrease the amount of oxygen.
__________ are heterotrophs that grow as a mesh of absorptive filaments. Some are plant pathogens. Fill in the blank(s) with the appropriate word(s)