Which of the following terms is used by ecologists to describe the community interaction where one organism makes the environment more suitable for another organism?
A) parasitism
B) mutualism
C) inhibition
D) facilitation
E) commensalism
Answer: D
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A gram-negative, polarly flagellated, aerobic bacillus-shaped bacterium that can degrade a large variety or aromatic compounds is likely a(n)
A) actinobacterium. B) enteric. C) pseudomonad. D) sphingomonad.
Which group of bacteria uses oxygen as a terminal electron acceptor and grows well in ambient air?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
In eukaryotes, aerobic respiration is completed in the _____
a. nucleus c. plasma membrane b. mitochondrion d. cytoplasm
Lampreys completely lack parathyroid glands. Suggest why these glands may be important for other vertebrates, but not for jawless fish.
A. Because they are parasitic, lampreys get plenty of calcium from their hosts. B. Jawless fish employ a different system than other vertebrates to regulate blood sugar. C. Since they have a cartilaginous skeleton but not true bone, they have less need to regulate calcium levels. D. Living in the ocean, they are surrounded by large amounts of sodium, chloride, and magnesium ions.