Answer:
real subtances? look around you and you'll find out
Explanation:
Answer:
(A) It will show whether the changes observed in group 1 depend on the metabolic activity of soil bacteria.
Explanation:
A control in an experiment is used to show the effects of one or more variables or chemicals on the experimental constraints such as the metabolic activity. Experimental results in the presence and absence of a given variable or chemical are recorded and compared to determine the effects of the chemical on the experimental results.
Just do it yourself we are not falling for it
Answer:
Number of hydrogen atoms in glucose
Explanation:
The correct option would be number of hydrogen atoms in glucose.
From the balanced equation of cellular respiration below:

There are 12 atoms of hydrogen in the water molecules produced just as there are 12 atoms of hydrogen in glucose (
).
<em>There are no hydrogen atoms in carbon dioxide.</em>
<em>The addition of hydrogen atom in the simplest sugar and hydrogen gas is 14, rather than 12.</em>
<em>There are no hydrogen gas in carbon dioxide and oxygen.</em>
<em>Hence, the correct option is number of hydrogen atoms in glucose.</em>