. In mitosis the nuclear membrane breaks down and the centrosome
Answer:
Marco polo worked as an administrator for 17 years.
Explanation:
Upon reaching China, Marco Polo entered the court of powerful Mongol ruler Kublai Khan, who dispatched him on trips to help administer the realm. Marco Polo remained abroad for 24 years
The graph is showing how primary production decreases as deep increases. It is due to the amount of available light in the water.
<h3>Primary production on the ocean</h3>
The primary production in the ocean is performed by microorganisms known as phytoplankton.
Phytoplankton populations are primary producers that include bacteria and algae, which use photosynthesis to produce biomass and release oxygen.
In a similar manner to plants, phytoplankton communities also contain chlorophyll in order to convert sunlight into biomass.
As ocean deep increases, the amount of available light in the water decreases, thereby also decreasing the primary production of the phytoplankton populations.
Learn more about primary production here:
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Deoxyribonucleic acid (DNA) - polymers of nucleic acids
