human population & biodiversity

A country in the first stage of the demographic transition demonstrates which of the following?

High birth rates, high death rates, and low rates of population growth

Which human intervention would most likely protect and maintain kit fox populations?

Protect grasslands and prairies from development.

The statistical analysis of a human population trends is called -

demography

Which of the following is an example of how an increase in biodiversity would influence an ecosystem

An increase in the number of species in the ecosystem would make the ecosystem stronger by increasing its stability and resistance to outside influences.

Which of the following describes the most likely cause of death for a citizen of a country in stages 4 and 5 of the demographic transition model?

Degenerative diseases due to old age and lifestyle

A developer proposes to build new houses and roads on land that is now part of Mairead Forest, which is a tract of 120 acres that the county has designated as conservation land. The developer points out that his proposal would keep the size of forested land at 120 acres. However, much of the forest would be divided into small pieces separated by highways, houses, and lawns. How would the proposed development most likely affect the biodiversity of Mairead Forest?

Biodiversity would decrease, because many animal species depend on large areas of land to survive.

A coastal area that once supported a thriving fishing industry is overfished. The number of species found living in the marine ecosystem decreases.Which of these activities is most likely to increase the natural biodiversity in the area?

Building artificial reefs and limiting fishing activity

Which of the following is a density- independent factor limiting human population growth?

Earthquakes

The New England cottontail is the only rabbit native to New England. Current populations are small and isolated because of habitat loss. Scientists are concerned about the possible extinction of the New England cottontail.​​Which of the following statements explains why having small and isolated populations puts these rabbits at risk for extinction?

Genetic variation is decreased, making the populations less able to adapt to environmental changes.

Which statement best explains why biodiversity is important for all life on Earth?​

High biodiversity tends to stabilize an ecosystem by reducing the rate at which species become extinct.

Which of the following is NOT a way that biodiversity is important to humans.

Hunting animals for food and their hides is necessary for human survival.

Which is true about the extinction of species?

Many species have become extinct throughout the history of life on Earth.

Cargo ships that transport goods require ballast water to remain safe and stable during their voyage. These ships collect water from their port of origin and release that same water at the final destination. The ballast water often contains aquatic organisms that are present in the water at the port of origin. The release of ballast water can introduce invasive species into an ecosystem. A regulatory agency is investigating several methods to prevent this from happening. The agency is interested in identifying solutions that meet the following criteria: ​Ensure that organisms are removed from ballast water Have minimal impact on the environment Are cost effective Are easy to implement Based on the agency's criteria, select three methods that offer the best solution.

Nonoxidizing chemical treatment - Effective - Some impact to environment - Easy - Average CFiltration - Very effective - Little Impact to environment - Medium - Average DThermal treatment - Effective - No Impact to environment - Hard - Average

Silver carp were intentionally introduced by humans to solve an environmental problem. Which claim is best supported by this information?

Silver carp were placed in fish farms to control the growth of algae

What effect might an invasive species have on the carrying capacity of an ecosystem?

The carrying capacity may decrease because there is more competition for limited resources.

Which two are the most likely reasons that the electric barriers are needed in addition to locks and dams to control the movement of silver carp?

The dams cannot prevent the movement of silver carp. When ships move through the locks, the silver carp can follow them.

Which activity would reduce biodiversity in a forest ecosystem?

clearing a large area and planting one species of hardwood tree that can be used for lumber

Asian carp, an invasive species, were introduced accidentally into Missouri aquatic ecosystems. Both the Asian carp and the native paddlefish are plankton feeders. After the introduction of Asian carp, the paddlefish populations immediately began to decline. Based on the information provided, why is the native paddlefish population declining?​

They occupy the same niche as the Asian carp. Native paddlefish compete for the same food as the Asian carp

Two savanna communities both contain 15 plant species. In community A, each of the 15 species is represented by 20 individuals. In community B, 10 of the species are represented by 12 individuals; the remaining 5 species are each represented by 3 individuals. Which statement best describes the two communities?

community A has a higher species evenness

Which change is most responsible for the decline of the kit fox population?

a reduction in carrying capacity due to habitat loss

The graph below shows the number of species that have become extinct since 1800. It also shows the change in the size of the human population during that same time frame. ​Which of the following is a conclusion that can be made from the information contained in the graph.

as the human population increases the number of species extinctions increase

Which claim about changes in biodiversity in the San Joaquin Valley is supported by the information in Figure 1?

biodiversity has decreased because a variety of habitats have been reduced

What is not a cause for the extinction of a species?

captive breeding

An invasive species called purple loosestrife is shown. It grows and reproduces quickly. It takes up space and changes the food chain.​​The table shows several organisms found in the Ohio River ecosystem that are affected by this invasive species. Choose the organism that will be competing with the purple loosestrife for space and nutrients.

cattail

What are the three main types of biodiversity scientists study?

genetics, species, ecosystems

The diagram below represents the varying biodiversity in three ecosystems. ​ The level of biodiversity in ecosystem A is high because it has the

greatest variety of genetic material

The early, rapid growth of the human population was a direct result of

increased food supply

Students are given an assignment to design a simulation that will model effects of human activity on biodiversity in a particular town. A student decides to model changes in the biodiversity of bird species caused by human activity in a forested park next to the school. The park is home to many native bird species. Near the park is a housing development and an industrial area

size of the park, number of native bird species in the park and number of native herbivore species in the park

the needs of humans are met in such a way that the human population can survive indefinitely

sustainability

Biodiversity is best defined as:

the variety of life in the world or in a particular habitat or ecosystem.

Which of the following is true about the characteristics of human populations?

they may change over time and differ region to region

Why was the Endangered Species Act (1973) created?

to protect critically endangered species whatever the cost.

Which biome has the greatest biodiversity?

tropical rainforest