What happens to the air around your vocal cords when you speak? a. It is heated
b. It is cooled
c. It is forced down your windpipe
d. It expands and contracts

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome

Which diagram best represents the chromosomes that would be found in a two new skin cells produced as a result of this process?