Emigration occurs when an organism __________ an ecosystem and immigration occurs when an organism __________ an ecosystem.

What must be true of prey organisms?

Carrying capacity is directly related to limiting factors.

The rocky edge of a pond is the ______________________ for a frog, it is where that organism is usually found.

A frog is a consumer that keeps the numbers of insects around a pond in check. The frog is also food for bird that live in the trees near the pond. These roles describe the frog’s ___________ (its unique role in the environment).

The American Bullfrog and the Northern Leopard frog are actually two different ________________. Although they are both frogs and live in the same environment, they cannot interbreed.

A group of organisms of the same species that live in a specific geographical area at the same time is known as a __________________.

In which of the following relationships is neither species harmed?

A true statement about parasitism is that parasites

Competition for food CANNOT occur

Each of the following is an example of a parasite except

The difference between a predator and a parasite is that a predator

Occurs when members of two or more species interact to gain access to the same limited resources such as food, light or space.

An interaction that benefits one species, but has little effect on the other species.

An interaction that benefits both species by providing each with food, shelter or some other resource.

A group of the same species, which interbreed and live in the same area at the same time would be considered a population.

The place where an organism lives is called its habitat.

The definition of symbiosis is...

Some living things depend on each other in a very close relationship, which lasts over time. This relationship is called ...

Tapeworms live inside organisms and feed on the nutrients of the food they eat. A tapeworm is an example of ...

The maximum population size that a given environment can sustain is the _______________________________.

Of the following, which provide the most complete picture of whether a population of humans grows, shrinks, or remains stable?

As a result of the one child policy, the sex ratio in China

Which of the following statements about Earth's carrying capacity for humans is true?

Food, water, shelter, and a space in which to live all describe an organism's

Population size is determined by which of the following?

Emigration is

Which of the following is not a limiting factor for populations in aquatic life zones?

Exponential growth followed by a steady decrease in population growth until the population size levels off is typical of

When plotting the number of individuals in a population against time the data yield a J-shaped curve, which indicates which of the following?

Which of the following is an example of a density-independent population control?

Which of the following is an example of a density-dependent population control?

There are always limits to population growth in nature.

A population's growth rate will increase as the population reaches its carrying capacity.

A barnacle grows on a whale, doing it no harm. This is an example of

Certain species of acacia trees in Central and South America have hollow thorns that house stinging ants, which attack anything that touches the tree. The ants feed on nutrients produced by the acacias. This is an example of _____.

A high density of elephant population in an area can result in

The carrying capacity of a population is determined by its

Which combination of factors will produce the highest rate of population growth?

An example of a density dependent limiting factor is

The equation for determining population growth is

A forest fire that kills a large percentage of a pine beetle population is an example of a density-dependent factor that limits population.

In year one of a study, there are 100 mice living in a field. In year two, there are 110. In year three, there are 121. In year four, there are 132. The mouse population is experiencing a logistic growth pattern.

Which of the following is not a density dependent factor?

A parasitic relationship is when two organisms of different species "work together," each benefiting from the relationship.

Bees fly from flower to flower gathering nectar, which they make into food, benefiting the bees. When they land in a flower, the bees get some pollen on their hairy bodies, and when they land in the next flower, some of the pollen from the first one rubs off, pollinating the plant. This is an example of what type of symbiotic relationship?

The spider crab and the algae. Spider crabs live in shallow areas of the ocean floor, and greenish-brown algae lives on the crabs' backs, making the crabs blend in with their environment, and unnoticeable to predators. The algae gets a good place to live, and the crab gets camouflage. This is an example of what type of species interaction?

In this relationship, a bird lives on the zebra sustaining itself by eating all of the bugs and parasites on the animal. What type of species interaction would this be considered?