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Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique.

Explanation:

D. DNA molecules

Hope this helps.

D) DNA Molecules

Currently, there are more sharps injuries (less than 2%) in the phlebotomy industry, due to employee training and current safety devices on hypodermic needles. at least 4% are during or after surgery. winged steel & butterfly needles are way less bcause of safety devices on the needle itself, 2 remind medical staff to apply safety guard right after injections, 1.5%