Which of the following is known for its swarming motility?
A. Proteus mirabilis
B. Escherichia coli
C. Klibsiella pneumonae
D. Pseudomonas aeroruginosa
Ans: A. Proteus mirabilis
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The sac which surrounds the heart is called the
A. endocardium. B. pericardium. C. atrium. D. myocardium
Heterotrophs that obtain energy and carbon by feeding on both animal and plant materials are called ____
a. detritivores b. herbivores c. carnivores d. omnivores e. decomposers
Most antihelminthic drugs function by
a. weakening the worms so that they can be flushed out by the intestines b. inhibiting worm metabolism c. blocking absorption of nutrients d. inhibiting egg production
The rough endoplasmic reticulum is a cell structure that consists of folded membranes that contain ribosomes. What is the advantage of the folded membranes?
A. increases surface area in order to produce more proteins B. decreases surface area in order to produce more proteins C. increases volume of the edoplasmic reticulum in order to produce more energy D. decreases volume of the endoplasmic reticulum in order to make more energy