Amino acids contain a acidic carboxylic acid group connected to their alpha carbon.<span> The alpha carbon is also connected to an amine group and an R group that is distinct to each amino acid.</span>
Oxygen Cycle just try looking it up next time ok
Using my knowledge abiotic factors include things such as wind, rainfall, sunshine, etc. If there are multiple choices to choose from then I could be more specific.
Positively charged objects and neutral objects attract each other; and negatively charged objects and neutral objects attract each other.
Vestigial structures are parts of an animal's body that serve no function, but did in earlier evolutionary stages. Two examples of this are the human appendix and the snake pelvic bone.