The answer is totally D. Chemical messenger !
none of the others really make sense haha
Yes B) A vector is a plasmid or virus used to move foreign genes into desired host cells.<span>is correct</span>
A common pioneer organism<span> in a primary </span>succession<span> is the. icº, ) - 3. The final stable state of a </span>succession is called the<span> (Mººp community</span>
<span>During photosynthesis, plants use carbon dioxide and produce oxygen. During metabolism oxygen is used and carbon dioxide is a product. Humans impact the carbon cycle during the combustion of any type of fossil fuel, which may include oil, coal, or natural gas.</span>