The answer is option A.
The Student identifies the test tube
that stops bubbling first contains the catalyst.
Because Catalyst is a substance which
increases the rate of reaction, and the reaction shows that when a product is
obtained bubbles formed.
<span>When the student added X, Y and Z to the
test tubes. The one which is a catalyst fastened the reaction.</span>
The ability to culture stem cells<span> has </span>important <span>implications, as they contain all of the genetic material needed for the formation of every </span>cell<span> type within the body. :)</span>
B!!!!!!!!!!!!!!!!!!!!!!!!!!
The answer is, How fast distant galaxies are moving away from us
