Exam 3: Ecosystems: What Are They and How Do They Work

Bacteria are more important in the ____________________ than in the carbon or phosphorous cycle.

Aerobic respiration requires

Match the items listed below with the appropriate choice -On the figure of the Earth, choose the letter that represents UV radiation.

In the Sonoran desert of the southwestern United States, scientists observed that population clusters of a small cactus were very pronounced around nests of desert woodrats. They began to think the woodrat was somehow connected to the seeding of these cactus plants.After years of counting and observing the woodrat nests and cactus plants, they collected the droppings of the woodrats and took them back to the lab to analyze them to see if they contained seeds of the cactus. They also collected the droppings and transported them to other areas to see if this would bring about new population clusters of the cactus.They also programmed the data they had collected into a computer. The computer program allowed the scientists to predict that increases in the woodrat population would result in increases in the cactus population, and likewise a decrease in woodrats would signal an impending decrease in cactus. -Which phase of the above-described situation could be called computer simulation?

The hydrologic cycle refers to the movement of

Tropical rainforests typically are found near the Equator, and are considered centers of ____________________.

Ammonia that is not taken up by plants may undergo ____________________.

The organisms that are classified as primary consumers are the

Another word for consumer is ____________________.

Which of the following biogeochemical cycles does not include the atmosphere as a temporary reservoir?

Match the items listed below with the appropriate choice -On the figure of the hydrological cycle, choose the letter that represents transpiration.

The planet's ____________________ ultimately limits the number of consumers that can live on the planet.

Bacteria and fungi are typically categorized as which of the following ecosystem components?

Match the items listed below with the appropriate choice -On the generalized structure of the Earth figure, choose the letter of the layer that is made up of the troposphere and the stratosphere.

With regards to productivity of an ecosystem, which of the following statements is accurate?

Gravity is one of the three factors that sustain life on Earth.

A grassy meadow high in the Sierra Nevada Mountains is known to support a variety of organisms. During the summers when grass is thick and lush, and wildflowers abound, butterflies take advantage of the abundant nectar source. Bears graze on the berries in shrubs at the edge of the meadow. Deer also forage at the edge of the meadow. In the early mornings, coyote are known to prey on the squirrel and mouse population that burrow into the meadow soil. A variety of birds prey on the butterflies and other insects such as bees and wasps. -The coyotes typically forage on mice and squirrels. However, as members of the canine family, Canidae, they are known to be able to eat berries and parts of plants as well as small animals. Thus, they would be classified as

The metabolic process by which plants are able to draw ____________________ out of the atmosphere is known as photosynthesis.

Ecologists study ____________________ in nature.

A(n) ____________________ consists of populations of different species living in a particular place and potentially interacting with each other.