When energy is transferred between trophic levels, the amount of available energy lost is about

Any being that uses the sun�s energy to create sugars is a

Which best describes evolutionary success?

In the years immediately after a fire, a forest will experience

Which of the following best describes a successful individual in evolutionary terms?

When the environment changes too quickly for an organism to adapt, what will occur?

Two species of finch live in the same environment. Over time, one develops a larger beak to consume larger seeds, while the other develops a narrow beak to consume more delicate seeds. This is an example of

An interaction in which an individual of one species kills and consumes an individual of another is called

In the Western US, at the southern edge of their range, moose are sometimes so severely infested with ticks that they die. The tick/moose relationship is best described as

A beehive depends on pollen from flowers to survive. Flowers depend on bees to pollinate them. Humans tend bee hives, offering the bees a place to live in exchange for some of their honey. The relationship among these three sets of organisms is

The ultimate source of energy in an ecosystem in which deer eat grass and coyotes eat deer is

In a food web that consists of grass, mice, deer, coyotes, and hawks, which species is likely to have the greatest biomass?

A niche restricted by competition is a

A deer browsing on a shrub is an example of

The first level of all food pyramids

Giraffes, lions, zebras, hyenas, and all the other living things of the Serengeti make up a(n)

Every spring, many species of bird travel north to the Arctic to breed, and in the fall travel south again for the winter. This is an example of

You will be conducting a study of the interactions of vegetation, animals, mineral composition of the soil, and water levels in a saltmarsh. You are studying the

�All the living things and their physical environment within a given area� best defines

In the example above, in which the wolf population reintroduced to Yellowstone National Park is growing, the number of elk and other prey species within the park are

Pandas depend on bamboo. The amount of intact bamboo forest will help determine

300 deer live within a 20 square kilometer area. 15 deer per square kilometer is the deer

The graph above represents

Fish, cattails, frogs, water lilies, dragonflies, and all the other living things in a pond make up

A grassland experiences a drought that causes most of the plants to die and several watering holes to dry up. The antelope that live on the grassland experience a decrease in population because water and plants are key

In a population of 100 monkeys, you count 48 males and 52 females. This population has an approximately even

In the graph above, the population size is

A caribou is adapted to live in cold tundra environments. It would not be able to survive in a tropical forest because the tropical forest does not provide a suitable

A population�s growth rate is determined by births, deaths,

An ecologist who is studying the mineral requirements and daily water intake of a plant species is studying the

Every summer, Siberian cranes fly from India to Siberia, where they breed and raise their young. When winter comes, the cranes fly back to India. This is an example of

An example of a density dependent limiting factor is