Biology A Ecology Unit Test Review *

Which term refers to all areas of Earth where life exists? biosphere biome community ecosystem

How could the loss of biodiversity affect humans? It may cause an increase in the human population as competition is reduced. It may lead to the loss of potential medicines, foods, and products. It could lead to a decrease in infectious and other diseases that affect humans. It could cause a decrease in the amount of pollutants on the planet.

The tundra ecosystem of Alaska is known as a "cold desert." It receives very little precipitation, about four inches annually. However, it is rich in wetlands due to permafrost, which traps moisture close to the surface. The temperatures vary widely, also producing persistent winds. Although treeless, the Arctic tundra is an abundant ecosystem. Many organisms find their niche here including many migratory bird species and mammals such as caribou, foxes, bears, and small rodents. Which element of the tundra ecosystem is biotic? wind dead bird carbon dioxide temperature

How do limiting factors most affect population size? stop population growth restrict population growth increase population size result in positive impacts

The Great Pacific Garbage Patch is an area in the north Pacific ocean that contains trash and causes harm to ocean life and those that consume that life. What lessons can be learned from this floating pile of trash? There is no relationship between our daily activities and the environment. There are more polluters in the Pacific ocean than in the Atlantic ocean. There are areas of the ocean to avoid with boats. There is a relationship among all living things on the earth.

Arianne recently traveled abroad where she enjoyed eating food from different countries and learning about different cultures. A week after she returned home, she checked into the hospital with signs of nausea, fever, and diarrhea. What best explains what happened to Arianne? A parasitic bacteria contaminated her food. A mutualistic bacteria infected her digestive system. A commensalistic organism is now living in her intestine. A predatorial organism is consuming her natural bacteria.

Which of the following could result in secondary succession? the formation of a tall sand dune on a previously grassy beach a vast glacier in motion forming a U-shaped valley on its wake a volcanic eruption that covers most of what used to be a forest an introduced species that devastates native plants as it feeds

Barnacles and whales have a commensalistic relationship in which barnacles benefit. What would most likely happen to the whale population if the barnacle population decreased? become extinct decrease increase stay the same

This picture shows the United States Arctic National Wildlife Refuge, a large portion of Alaska that is protected from human activities that would affect living things in the area as well as nonliving resources that support living things. Even though oil and other resources in the area could be collected and sold by humans to increase American wealth, construction is prohibited in the area. The most complex level of organizational hierarchy in the Arctic National Wildlife Refuge that is preserved is the population of brown bears in the area. every species of fish in the area. every ecosystem in the area. the biosphere that includes Alaskan life.

A conservation biologist has determined the status of the ecosystems in a protected area, as shown in the table below. Based on the table, which part of the pie chart represents secondary succession?

How does conservation affect biodiversity? It helps to preserve climate change. It decreases species diversity. It helps to preserve biodiversity. It decreases ecosystem diversity.

How does mining impact the environment? It has a positive impact on the environment by permanently altering the ecosystem. It has a positive impact on the environment by releasing chemicals into the environment. It has a negative impact on the environment by allowing toxic chemicals to harm wildlife. It has a negative impact on the environment by creating new niches for wildlife to inhabit.

Which answer gives both a positive impact and a negative impact that are associated with the effects of nitrogen- and phosphorus-enhanced fertilizers? increased algal blooms and damage to drinking water increased plant growth and damage to drinking water increase in denitrifying bacteria and increase in plant growth increase in a limiting resource and increase in denitrifying bacteria

Which best describes niches? If two species have the same niche, one species will always become extinct. Two species are able to occupy the same niche in the same habitat. Two species cannot occupy the same niche in the same habitat. If two species have the same niche, one species will always move.

The coyote is one of the most adaptable animals in the world. It can change its diet to include small mammals, livestock, birds, reptiles, carrion, fruit, and vegetables. It is one of the few animals that has enlarged its range since human encroachment began. Which is the most likely reason for this? It has adapted its diet to include more variety, thereby increasing its food supply. It has intermingled with human pets, such as the dog, to increase its population. It has migrated to ranges with more favorable, moderate climates. It has an increase in nest and shelter sites within the urban and rural range.