It is important to have more than one trial in a well- designed experiment because repeated trials can help reduce the effect of errors and it can increase the accuracy of the result of the experiment.
Answer:
Hi I dont know if this is an actual question but if it is it is not showing up.
Explanation: Have a good day
Answer:
A) chemical reactions.
Explanation:
"Photosynthesis is the process through which plants convert light energy into chemical energy. Here is the chemical reaction involved: As we can see, water and carbon dioxide combine to form glucose and oxygen. Since new chemical species are formed, photosynthesis is clearly a chemical change.
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I think its Desert climate
Explanation:
A keystone species is an organism that helps define an entire ecosystem. By keeping populations of mussels and barnacles in check, this sea star helps ensure healthy populations of seaweeds and the communities that feed on them—sea urchins, sea snails, limpets, and bivalves.