He is incorrect because a catalyst is a substance that speeds up a chemical reaction so if there is no reaction to begin with a catalyst will not due anything.
Answer:
True
Explanation:
We are learning about this in science this week and im pretty sure this is true.
The answer to this question would be: paranasal sinus.
There are a few sinuses near the face area. The sinus can be classified based on the bone that makes then to sinus maxillae, ethmoid, sphenoid and frontalis. This structure frequently gets infected causing sinusitis. Sinusitis patient can complain pain or feel the sinus got filled with some liquid.
I’m not exactly sure, but I’m thinking it may be A . I just learned about this unit previously .
Some unicellular organisms are similar to animals because they have the ability to move.
Third option
