Question

1. describe evidence the algae in the tank are 600.

cell density: decreases
dissolved oxygen: overall decrease
water color: changes from green to brown.

• the decomposition of algae occurs when other organisms perform cellular respiration, decreasing overall dissolved oxygen.
• living algae performs photosynthesis, increasing the overall dissolved oxygen.
• living algae perform photosynthesis, decreasing the overall dissolved oxygen.

Explanation:

Living algae perform photosynthesis which increases dissolved oxygen. Dead algae decompose as other organisms do cellular - respiration, decreasing dissolved oxygen. Also, living algae often give water a green color due to chlorophyll, and when they die, the water color may change. A decrease in cell density can also indicate death.

Answer:

• Cell Density: Decreases
• Dissolved Oxygen: Overall decrease
• Water Color: Changes from green to brown