What is one disadvantage of desalination?
a - the process kills fish.
b - the process uses fuel that is expensive.
c - the process makes water that is unsafe to drink.
d - the process is too difficult to carry out in big cities.

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. the following chemical equation shows the combustion of ethane. balance the equation by filling in the coefficients. c2h6 + o2 → co2 + h2o

In which of the following relationships is one organism always benefited while the other organism is always harmed

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes