(1)As a cloud of gas and dust collapses on itself and becomes more dense, the temperature at the center of the cloud

A, Increase
B, Decrease,
C, Stay the same.

(2)What is the first step in the nuclear fusion process?

A, two helium atoms combine to make one hydrogen atom
B, two hydrogen atoms combine to make one helium atom
C, two helium atoms combine to make one carbon atom

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

bc blah

explanation:

bc blah

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products