Defend why is it unsurprising that two-component regulatory systems are all but absent in bacteria that live at the expense of a host?
What will be an ideal response?
Answer: Answers will vary, but a possible explanation is that an organism that has adapted to living inside of a host has such a narrow metabolic capacity that responses to nutrient limitation are less necessary than a bacterium growing in a dynamic community.
You might also like to view...
Conifer resin has what properties?
_____ It hardens on contact with air. _____ It flows through ducts in the wood and leaves. _____ It forms amber, often trapping insects and other organisms. _____ It attracts insects and other organisms that facilitate reproduction. _____ It can prevent attack by herbivores and pathogens.
The transmission cycle of Fasciola hepatica differs from the cycles of Opisthorchis sinensis and Clonorchis sinensis in that
A. encystment occurs on a freshwater plant. B. freshwater snails release cercariae. C. eggs are released from an infected human via the urine. D. helminth development occurs in the liver.
Both mitochondria and chloroplasts are
thought to have evolved by the process of
a. endosymbiosis. b. sexual selection. c. allopatric speciation. d. sympatric speciation. e. more than one of these.
It is quite common to ingest trace amounts of aflatoxins when one eats
a) fruit. b) meat. c) peanuts. d) cheese.