Synechococcus, a Cyanobacterium, Is a Free-Living Marine Organism That Fixes

question 74

Multiple Choice

Synechococcus, a cyanobacterium, is a free-living marine organism that fixes CO₂ into biomass while producing molecular oxygen utilized by swarms of heterotrophic bacteria. Its biomass provides food for protists and predators. What is the niche of this organism?

• A) phototroph in the open ocean
• B) base of the food chain
• C) nitrogen assimilation for the ocean environment
• D) all of the above
• E) none of the above

---

Definitions:

Savings Market

The financial market where savings are channeled from individuals or entities with surplus funds to those who need funds for investment.

Investment

The allocation of resources, such as capital or time, in the expectation of generating an income or profit.

Certificate Of Investment

A financial document representing a deposit with a specified interest rate and maturity date, often issued by banks.

Bond

A contract between a borrower and a lender, in which the borrower agrees to pay the loan at some time in the future. Some bonds also make regular, constant payments once or twice a year.