Which relationship is MOST likely to be observed between species of different classes?
A) A deltaproteobacterium oxidizes hydrogen sulfide into sulfate, which is then reduced by an epsilonproteobacterium.
B) An epsilonbacterium oxidizes the hydrogen sulfide produced by a sulfur-reducing deltaproteobacterium.
C) A sulfate-reducing epsilonbacterium produces sulfite, which a deltaproteobacterium reduces to hydrogen sulfide.
D) Syntrophic metabolism of sulfur by a deltaproteobacterium and an epsilonproteobacterium occurs.
Answer: B
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Which of the following is true of hydrogen peroxide?
A. It is a sterilant for inanimate objects and is quickly inactivated on living tissue. B. It leaves a toxic residue. C. It is broken down by catalase into water and oxygen. D. It is even more effective when used in combination with peracetic acid. E. It is a sterilant for inanimate objects and is quickly inactivated on living tissue; it is broken down by catalase into water and oxygen; AND it is even more effective when used in combination with peracetic acid.
Homoplasies are the result of convergent evolution
a. True b. False
The courtship display of the wandering albatross is primarily a(n) ____display
a. acoustical b. visual c. chemical d. electrical e. tactile
What tissue in vascular plants would be used to move water and dissolved minerals from roots to the stems and leaves?
a. sclerenchyma b. phloem c. collenchyma d. parenchyma e. xylem