Answer:
all of the above can lead to increase in nitrogen
I disagree because although recycling is good, Earth firstly is not a closed system and new matter enters the environment all the time, such as comets.
The answer is false.
Because DNA only sends genetic info.
UGU and UGC both code for cysteine. A change from UGU to UGC would thus be a silent <span>mutation.</span>
Constants never change.
Controls typically don't change or they are done by standard means
(like in an experiment where you water plants with sodas, the plant you use water with is the control)
Dependent variables are the outcome of the experiment. This is the result of changing something.
Independent variables are what you are testing. A independent variable is something that is intentionally altered.
easy way to remember it is that dependent variables depend on what other variables are. so you cant change a dependent variable, but you can change the other variables.
