A Pond Ecosystem Includes Small Water Fleas Which Feed on Submerged

question 34

Multiple Choice

A pond ecosystem includes small water fleas which feed on submerged aquatic plants. When the water fleas die, they sink to the bottom of the pond where they decompose with the help of bacteria. List in order the producer, decomposer, and consumer in this system.

• A) water fleas, bacteria, aquatic plants
• B) aquatic plants, water fleas, bacteria
• C) bacteria, water fleas, aquatic plants
• D) aquatic plants, bacteria, water fleas
• E) bacteria, aquatic plants, water fleas

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Definitions:

CNS Cavities

Hollow spaces within the central nervous system, including ventricles in the brain, filled with cerebrospinal fluid.

Astrocytes

Astrocytes are star-shaped glial cells in the brain and spinal cord involved in providing support and nutrition to nerve cells, maintaining the blood-brain barrier, and repairing the brain and spinal cord following traumatic injuries.

Microglia

Specialized immune cells found in the brain and spinal cord, involved in the maintenance of nerve cells and the response to injury or disease.

Ependymal Cells

Glial cells that line the ventricles in the brain and the central canal of the spinal cord, involved in the production of cerebrospinal fluid.