Human activity has not affected most parts of the global biosphere, and has helped most biomes become healthier
Indicate whether the statement is true or false.
Answer: FALSE
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In the reaction below, what does the symbol ? mean? OH- + NH4+ ? H2O + NH3
A. It means that the forward and backward reactions are happening at the same time. B. It means that the forward reaction does not progress. C. It means that the backward reaction happens as fast as the forward reaction and so the proton is not transferred at all. D. It means that the reaction cannot decide which way to go. E. none of the above
Why might disposing of a lead-acid battery, nickel-cadmium battery, or mercury battery in a landfill be a bad thing?
A. Cadmium, mercury, and lead are all very reactive and generate highly unstable compounds. B. Cadmium, mercury, and lead are all radioactive and release radiation. C. Cadmium, mercury, and lead are all toxic metals and could leak out of the landfill. D. all of the above E. none of the above
Ice is effective at cooling drinks because of the ____
a. sensible heat loss of water b. heat capacity of water c. latent heat of fusion d. diffusion of heat energy e. latent heat of vaporization
In the Riftia-symbiont relationship, the benefit to the host during mutualism includes ________.
A. a predation advantage B. protection from competition for space C. organic matter, that is, food D. protection from predation E. protection from parasites