Exam 33: Ecology, the Environment, and Us

Crop rotation occurs where different types of plants are grown on the land each season. If you had no access to chemical fertilizers, which of the following would be best to include in your rotation cycle?

What is mainly responsible for the loss of biodiversity globally?

The saguaro is a giant cactus that is found in desert regions of Arizona. This is information about the cacti's ________.

Match each definition to the correct term -Diatoms perform photosynthesis, so they fill this role in the community.

Dieldrin was a chlorinated hydrocarbon insecticide that was remarkably useful against termites because it did not seem to degrade when applied to wood. What issue would you expect with its use?

The progression of species that would take place in an abandoned field is called ________.

How has human activity added to eutrophication of freshwater lakes?

The element molybdenum is vital in the process of nitrogen fixation. For which crop would molybdenum be most critical to ensure success?

Match each definition to the correct term -Most of the noncycling carbon is in this form.

Which of these options would be the most efficient human food source?

If you were raising frying chickens, how much meat could you produce given a metric ton (1000 kg, or 2200 lb) of feed?

Why is the total biomass of secondary consumers normally less than that of primary consumers?

PCBs were frequently used in electrical transformers. A young man digs in an abandoned industrial site, finding old transformers, and sells the copper wire from them to a scrap yard. What health problems might the young man have in the future?

If a plant could not get enough phosphorus, then it could not make ________.

Match each definition to the correct term -The animals that eat plants exclusively as their main energy source.

Which of the following contains the most species of living things?

The study of the interactions among organisms and between organisms and the environment is called ________.

It is important for cattle to add proteins to their body, so which plant would be best for them to eat?

American bison consume only plants, so we would say they are ________.

Two human activities, burning fossil fuels and ________, are important causes of the increase in atmospheric carbon dioxide.