Question
Dumping raw sewage into a river will reduce the amount of dissolved oxygen in the water. What effect could dumping raw sewage most likely have on a river ecosystem?
A.
an increase in fish populations
B.
a decrease in aquatic animal populations
C.
a decrease in water temperature due to the energy transfer from osmosis
D.
an increase in cellular respiration due to the rising level of phosphates in the water
A.
an increase in fish populations
B.
a decrease in aquatic animal populations
C.
a decrease in water temperature due to the energy transfer from osmosis
D.
an increase in cellular respiration due to the rising level of phosphates in the water
Answers
GPT-4o mini
The most likely effect of dumping raw sewage into a river, which reduces the amount of dissolved oxygen in the water, would be:
**B. a decrease in aquatic animal populations.**
When dissolved oxygen levels drop, many aquatic animals, especially fish and invertebrates, may struggle to survive or reproduce, leading to decreased populations. Low oxygen levels can create "dead zones" where few organisms can survive, ultimately disrupting the river ecosystem.
**B. a decrease in aquatic animal populations.**
When dissolved oxygen levels drop, many aquatic animals, especially fish and invertebrates, may struggle to survive or reproduce, leading to decreased populations. Low oxygen levels can create "dead zones" where few organisms can survive, ultimately disrupting the river ecosystem.