Answer: The answer is A. Comparative
Explanation: The photo shows two different types of soil with the same type of worm. Therefore this it a comparative experiment. Trust me I got this question correct.
Answer:
C. It is double stranded, so each side serves as a template for a new strand
Explanation:
A.
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Nitrogen fixation- atmospheric nitrogen is assimilated into organic compounds especially by certain microorganisms as part of the nitrogen cycle.