Why is it unique to Mitosis and Meiosis to Involves DNA and Chromosomes?

Which of these is a provisioning service people get from the ocean

The bacteria in the human gut feeds on the food we eat and us break it down for better digestion. what does this exemplify? (a) predator-prey cycle (b) parasitism (c) mutualism (d) a disrupted food chain

What is the name of the protein found in erythrocytes that transports respiratory gases and provides the red color?