Which of the following systems is the most stable in terms of species composition and distribution?
A. populations
B. communities
C. ecosystems
D. biomes
E. trophic pyramids
D
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The site or natural environmental location in which the causative organism is normally found is called the ________.
A. carrier B. animate phase C. reservoir D. source
Which was the primary challenge animals faced in adapting to life on land?
a. The presence of new predators b. Being able to adapt to move on land c. The need for more oxygen to do work d. Finding a mate in the new environment e. The desiccating effect of the atmosphere
Some microbes convert iron to magnetite, which is then used as an internal compass to help position the microbe correctly in its environment.
Answer the following statement true (T) or false (F)
Which organism is widespread in tropical Africa and related to the organisms that cause tuberculosis and leprosy?
a) Pseudomonas aeruginosa b) Staphylococcus aureus c) Streptococcus pyogenes d) Mycobacterium ulcerans