Exam 33: Ecology, the Environment, and Us

The fly agaric, a giant toadstool, consumes dead organic material, so it is said to be a(n) ________.

Alfalfa plants occur symbiotically with bacteria that can convert nitrogen gas to ammonium in a process called ________.

Match each definition to the correct term -The study of the relationships between organisms and their environment.

The sequence of changes in the species that make up a community is called ________.

A parasitic tapeworm living inside the intestines of a plant-eating porcupine would be at what trophic level?

Match each definition to the correct term -Yeasts consume garbage and other dead organic matter, so they are called this.

Match each definition to the correct term -The animals that consume the producers for their metabolic requirements.

A developer plans to chop down several healthy trees on her property, burn them, and put a huge concrete pad in their place. Why are these activities environmentally unwise?

A certain species of tiny wasp lays its eggs within the bodies of caterpillars, whereupon the larvae of the wasp consume the 10-g caterpillar. Assuming that the entire victim was consumed, what would be the total mass of the eventual adult wasps that emerge from the caterpillar?

Match each definition to the correct term -A lion feeds only on mammals, so it would be said to be this.

The process by which light energy is used by plants, algae, and cyanobacteria to form sugar is called ________.

Mot-mots are snake-eating birds of the American tropics. If a mot-mot killed and consumed a rattlesnake and that snake fed upon grain-eating rodents, then how many kilograms of grain would normally be required to end up with 1 kg of mot-mot?

While a backhoe operator is helping to clear land that will be used for a poultry farm, the equipment opens up a hidden chamber in which old electrical transformers have been buried. The operator knows that transformers contain PCBs. Why should this person warn the owners of the land?

A(n) ________ includes all the individuals of the same species that can potentially interact.

A(n) ________ is a diagram in which blocks represent each trophic level.

What are the benefits of maintaining biodiversity?

________ describes the number of individuals at each trophic level multiplied by their dry weight.

All the potentially interacting species in an ecosystem are said to make up a(n) ________.

Red foxes eat a wide variety of plants and animals, so we would say they are ________.

The volcanic island Selkirk arose from the North Atlantic off Iceland in 1948. The first organisms to start living there are said to be ________.