They are basically the next step up from atoms. They are smaller living organisms. (might not be helpful but it's a start)
1. Testing only one variable
A controlled variable means its the one that stays the same. In a controlled experiment, it means there is only one manipulated, (changed) variable.
Answer:
the awnser is A river basin
Explanation:
because I'm smart just trust me m8
Answer:
A:T;G:C
Explanation:
adenine goes with thymine unless it's mRNA and it will go with uracil. guanine and cytosine always go together.
