Answer:
Oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, which lead to the lungs.
Answer:
by fossil dna
Explanation:
it is too easy for a sciencetist
Hello, this would be known as Eye Tabbing.
Hope this helps<3
An independent variable is a variable which change is not affected by that of another variable. By process of elimination you can take out B and C. An independent variable can also change so that takes out A. That leaves D.
