C. Costal surface.
Please please pleaseeee tell me if this is wrong.
3, 1, 2, 5, 4. :-) I hope this helped. DNA is the smallest and the atmosphere is the largest.
Observation the action or process of observing something or someone carefully or in order to gain information:
The purpose of the organs<span> of the </span>male reproductive system<span>is to perform the following </span>functions<span> To produce, maintain, and transport sperm </span><span> and protective fluid (semen) To discharge sperm within the female </span>reproductive tract<span> during sex</span>
Both. You can use it as singular or plural.
