The arrangement of different ages in a population is called the population's

Declining death rates due to increased food production and improved medical care while birth rates remain high is characteristic of the ______ stage.

The two processes that determine the world's current biodiversity are:

Which of the following statements best describes competition for a niche?

Global warming has been hypothesized to cause many plants to flower earlier. If bees search for food earlier in response to this, this would represent ____ within the community.

The species most often vulnerable to human impact from habitat loss and poaching is the _____.

The highest rate of extinctions for organisms in Alabama can be found in ______ environments.

About half of the endangered or threatened species listed for Alabama are

Which year listed below demonstrated the greatest volume of recycling from the data in the graph titled Recycling Tonnages, 1960–2018?

What is the MOST dangerous pollutant to freshwater ecosystems, and why?

Which of the following organisms is known for creating the first delicate layers of soil? (Pioneer species)

is the process by which primary producers use sunlight to convert carbon dioxide and water into sugars.

Which of the following organisms is a decomposer?

Which of the following is an interaction in which one organism benefits and the other is harmed?

Ecosystems with high biodiversity levels

Carrying capacity refers to

Which of the following human populations is experiencing high birth and high death rates?

In the demographic transition model, first the ______ rate will decrease, and then the ______ rate will also decrease, stabilizing population growth.

The amount of offspring that a single female can produce in her lifetime is known as:

A “developed” nation refers to the fact that it has

Which of the following is an end product, or output, of photosynthesis?

Which processes are shown by letters D and G?

Which of the letters in the diagram represent something that will decrease atmospheric carbon dioxide levels?

Humans have dramatically altered the rate of nitrogen fixation into forms usable by autotrophs _____.

By damming rivers and using methods such as flood irrigation, we are:

Nitrogen fixation is a process that makes nitrogen available to plants and is carried out by

How do plants contribute to the water cycle?

Which two factors can speed up the process of evaporation?

The origin of all phosphorus in biological tissues is

Tigers living in warm climates have thinner coats of fur than tigers living in cool climates. This is a result of

For every 1,000 babies born in Mozambique this year, nearly 150 of them will die before they reach their 1st birthday. The rate of 150 deaths per 1,000 births is known as the:

The organisms in the picture above are engaged in which type of species relationship?

The Sikhote-Alin Mountains, and the Siberian tigers living on them, are separated from other mountain regions in which the tigers could live. The mountains are an example of a(n)

A high infant mortality rate is most often associated with

The population change in a particular year can be calculated by

In the demographic transition model, birth and death rates are lowest during the

What is the correct hierarchy of taxonomic groups, from largest to smallest?

The addax is an endangered antelope. During the summer its coat is white and during winter its hair turns brown. Addax are nocturnal and do not drink. They get their moisture from succulent plants. Their hooves are broad with flat soles. In which of the following biomes would the addax most likely live?

A caterpillar eats some grass. A bird eats a caterpillar. A fox eats a bird. Which of the following food chains represents this series of feeding relationships?

Identify where most of the energy is located in the ecological energy pyramid shown, which has producers at the broad base and higher-level consumers toward the narrow top.

A population of wolves is seeing a birth rate of 5 per year and a death rate of 3 per year. There are 2 immigrants and 4 emigrants in the same time period. Is the population getting larger or smaller?

Per capita land consumption means the

Which of the following is often a result from land development for resource extraction?

If we were to restrict water use globally, which industry would have to make the greatest cuts to be most effective at conserving water?

Marshes, bogs, swamps, estuaries, mangrove forests, deltas, and bayous are all examples of

Which type of organism is responsible for making the nitrogen cycle work?

Which biogeochemical cycle is represented by the image showing gas in the atmosphere, bacteria in root nodules of legumes, bacteria in soil, nitrate ions, ammonium ions, decomposers, dead animals and plants, and amino acids and proteins in plants and animals?

Which of the following is NEVER considered a renewable resource?

Which of the following is true about nations that have the largest ecological footprint (resource use)?

Which of the following is NOT part of a scientific study being peer-reviewed?

Kayaking on a river with friends is the use of which ecosystem service?

Many individuals of one species together in one place at the same time is considered

Look at the population pyramid. What can you predict based on this information?

Which of the following is an example of climate?

Because frogs absorb both oxygen and toxins through their skin, they are very sensitive to air and water quality. This makes them an excellent

Which of the following is not true about mangrove trees?

Which of the following is not an example of secondary succession?

A species that absorbs nutrients primarily from the air rather than soil would likely be

What is the name of the process used by a scientist when studying a small part of a larger ecosystem as an indication of what happens in the larger system?

When collecting and processing minerals for use, which is the most damaging type of mining for the environment and living species, including humans?

Which type of forest product harvesting is the least ecologically damaging, although it costs more than other processes due to having to take time and effort to reduce impacts?

If Chile is experiencing a particularly warm year, this could be caused by

The phosphorus cycle is unique because it does not include which location?

Which process takes carbon dioxide from the air and converts it into organic matter?

A location that releases more of a nutrient than it takes in, or that stores nutrients for long times, is called a

Which of the following is NOT a greenhouse gas?

The atmosphere is the largest reservoir for which nutrient?

A place where an organism lives is called its

Which level of an energy pyramid is most likely to have the highest number of organisms?

Two types of organisms consume dead and decaying matter. The difference between them is that ____ are consumers that feed on large dead organisms, while ____ break down organisms into simpler molecules.

The viceroy butterfly and the monarch butterfly look very similar. Both are distasteful to predators. This is an example of

Cowbirds are known to lay their eggs in the nests of other birds. Those birds will feed the new chicks and their own, which sometimes means not every chick gets enough food. This is an example of

Which sphere of the earth is named using the Greek root meaning "ground"?

Which of these is NOT an example of an abiotic factor?

Which kind of niche takes competition between organisms into account?

How much chemical energy is transferred from one trophic level to the next in a food chain?

If the producers in a forest make 20,000 Calories, how much do the secondary consumers receive?

Organisms that eat both plants and animals are called

Which is not true about food webs?

If the gene pool of two populations are separated, the populations may develop into a new species. This is called

20 different species of galagos, also known as bushbabies, are found in Africa. Even though various species of galagos share habitats, they cannot interbreed with one another because of their differently structured genitalia. Which type of speciation is this?

An ecologist is discussing two animals' ability to reproduce with one another. Which would be the appropriate term?

Which is NOT true about animal species?

Which type of organisms would you expect to have low levels of natal care and a short life expectancy?

Long life expectancy usually correlates with all the following, EXCEPT:

Which of the following is NOT a density-dependent limiting factor?

What causes a J curve to flatten into an S curve?

When a population passes its carrying capacity, which of the following will likely happen?

The primary cause of biodiversity loss worldwide is

Which of the following field techniques would be most helpful when studying migratory patterns of an endangered bird?

A species that is accidentally introduced into an ecosystem is called a(n)

Ecologists study matter and systems in an organized manner. Choose the correct sequence of organization from the least inclusive to most inclusive:

Which type of pollution is shown in the image below?

Where does the majority of plastic waste end up?