Homeostasis means that
A. cells have enough water.
B. all organisms require an energy source.
C. environmental conditions are held constant and do not change.
D. a population changes over time.
E. conditions inside a cell or organism remain within a constant range.
E. conditions inside a cell or organism remain within a constant range.
You might also like to view...
Consider the global nitrogen cycle depicted in the figure above. How are humans altering this cycle?
A) industrial nitrogen fixation B) nitrogen lost to the atmosphere C) reduction of nitrogen available to terrestrial ecosystems D) reduction of nitrogen fixation by bacteria E) permanent burial of nitrogen in coastal environments through runoff
Which of the following are characteristics of hydrogenosomes that distinguish them from mitochondria?
A. The inner membrane of hydrogenosomes is not highly folded. B. Hydrogenosomes have no DNA. C. Hydrogenosomes generate ATP by fermentation. D. All of the choices are correct.
Anabolic reactions that involve ligases and release water molecules when bonds are formed are called ________ reactions.
A. condensation B. oxidation C. transfer D. reduction
Which of the following bodily fluids is commonly a source of infection by HIV?
A. breast milk B. semen C. vaginal secretions D. both semen and vaginal secretions E. breast milk, semen, and vaginal secretions