Biology Ch 3-6: Ecology

Which plays the most vital role in nutrient cycling in ecosystems?

Which of the following is the MOST direct threat to biodiversity?

Which of the following is arranged in the correct sequence from most to least inclusive?

At which trophic level would you find most plants?

Which is NOT a climate zone caused by the curvature and tilt of the earth?

Which of the following is NOT a characteristic of a population?

A bird that picks bugs from a large mammal may be a

Which is NOT one of the main chemical cycles in nature?

Organisms that must feed off of other organisms in order to survive are all

Each trophic level loses

Patterns and averages of temperatures and precipitation over many years is an area's

What is the difference between chemicals (matter) and energy in an ecosystem?

Symbiosis means

Heartworms can infest a dog's heart, causing major problems for the dog. This is an example of

Organisms that eats things that are already dead are

Two species cannot occupy the same

Which biome holds the most species diversity?

A mountain lion is a _______________ and a deer is a ________________

An area where rivers and streams meet the ocean is called a(n)

Nonliving parts of the environment, such as light, heat, and weather, are called

Humans, bears, and most primates are

All organisms take in energy, and all lost energy in the form of _______________ to their surroundings.

A nonnative species whose introduction can cause harm to the environment, economy, or to human health, is called a(n)

Different populations living in the same area is a(n)

The portion of the earth that supports life is the

What is the limiting factor for the growth of trees in the tundra?

A biome with low productivity due to little rainfall is the

Which is NOT a type of biodiversity?

When organisms colonize brand new sites that lack soil, this is called

Both the clownfish and the anemone benefit from their relationship. This is

What element do we use in fertilizer that can contribute to algal blooms?

A group of organisms of the same species living in the same place is a(n)

Which biome is very productive due to year round warm temperatures and rainfall?

Although the human population is ___________________, the rate of growth has been ___________________

Temperature, water, sunlight, wind, and soil are all

Areas of marine biomes that receive NO light are called

Ticks benefit at the expense of their host. This is called

If barnacles make their home on a whale's fins, this is an example of

Oceans and seas are __________________ ecosystems

How does most CO₂ enter the atmosphere?

Which is NOT a material that gets recycled in nature?

The presence of ______________________ characterizes the tundra.

Primary consumers are often

Each step in a food chain is called a(n)

The place where an organism lives out its life is called its

The area of oceans and lakes that is shallow enough for light to penetrate is the

Under ideal conditions with unlimited resources, a population will experience ___________________ growth

A network of interconnected food chains is a

The main reason polar regions are cooler than the equator is that

A relationship where one species benefits and the other is not harmed or benefitted is

What is the main cause of the increase in the amount of CO₂ in Earth's atmosphere?

The first species to colonize a barren area are called:

Ecological _________________ show the relative amount of energy or matter contained within each trophic level

All food chains must begin with one