Question

1. consider the data you have collected. select true or false to each of the following statements. statement true or false algae perform both photosynthesis and cellular respiration when the lights are on. a the population density of algae increased throughout the entire time of the video. b the dissolved oxygen levels go up and down each day. c the color of the tank remained the same the entire time of the video. d the lowest average oxygen levels occurred when the tank was brownish. e

Explanation:

• Algae are photosynthetic organisms and also carry out cellular respiration. When lights are on, they can perform both processes, so the first statement is True.
• There is no information to suggest that algae population density increased throughout the entire video time, it could have fluctuated, so the second statement is False.
• Dissolved oxygen levels in an environment with photosynthetic and respiring organisms like algae can vary daily due to the balance between photosynthesis (which releases oxygen) and respiration (which consumes oxygen), so the third statement is True.
• As algae grow and their population changes, the color of the tank can change due to the presence of more or less pigment - containing algae, so the fourth statement is False.
• Brownish color in a tank with algae may indicate a high level of algae decomposition or a different state of the algal population where more oxygen is being consumed for respiration, so the lowest average oxygen levels may occur when the tank is brownish, so the fifth statement is True.

Answer:

A. True
B. False
C. True
D. False
E. True