A chemical reaction is the only way to separate an? element

pure substance

mixture

solution

Mark this and reti

With the exception of discovering new microbes, does it make sense to believe that the current taxonomic organization of microbes will remain the same in the future? Why or why not?

The population density decreases as the number of individuals in an area increases. true or false

Runoff that contains fertilizers can cause increased levels of nitrogen in the ocean. What is a possible result of these increased nitrogen levels that may have harmful effects that can disrupt the diversity of ocean ecosystems?

The trace mineral that is not an essentiak nutrient is

2. The attraction of two atoms for a shared pair of electrons that hold the atoms together

One percent of the atmosphere is ___ gases.

When biuret solution is used as an indicator, it turns from blue to purple in the presence of which organic molecule? A) lipid B) protein C) nucleic acid D) carbohydrate

What is earth's motion around the sun in a path called?

The real cost of producing a good is

What type of compounds always contain carbon and hydrogen