acid test
Explanation:
the first test the chemist should do is an acid test
<em><u>Plants</u></em> : plants are generally <em><u>autotropic</u></em> living organisms, that prepare their own food by using simple substances through <em><u>photosynthesis</u></em>,
eg. maple, bamboo, etc.
<em><u>Consumers</u></em>: these are living organisms that doesn't produce their own food and depends upon <em><u>producers</u></em> and other <em><u>consumers</u></em> for food.
eg. Human, rat, etc
<em><u>decomposers</u></em> : these are living organisms that break down the <em><u>dead</u></em> and <em><u>decaying</u></em> body of organisms to obtain their food,
eg. bacteria, mushrooms, etc
<em><u>producers</u></em> : these are living organisms that produce their own food through process of <em><u>photosynthesis</u></em>.
eg. plants, cyano bacteria, etc
The roots will grow toward the ground despite being planted upside down due to gravity. Due to gravity, the roots will turn and grow towards the ground, following gravity's pull. So, I believe D?