I would say d. Multi-part protein that reversibly binds to oxygen molecules (...)
Answer:
Letting go of regrets and past decision.
Explanation:
1. molecul of DNA 2. dna packed (coild) around histon h1 3.second stage of dna packing -solenoid thread 4. third stage of packing-chromosomal thread 5.chromosome-chromosomal threads are packed inside
Food webs are more complex than food chain