The warm air will rise because cold air is heavier than warm air.
Hello there :)
I am quite sure this is a true/false question
This statement is false.
Yes, the cilia and mucus in the trachea does sweep upward, however, it moves the mucus towards the pharynx where it is swallowed not towards the nose where it is sneezed out.
A cross between two different lines and/ or genes that differ in two observed traits.
Answer:
A
Explanation:
because it increase alot of living organisms it A
D-a trait that helps an organism survive in its environment
