Cumulative Exam — Cumulative exam Answers

The traditional view of mangrove forests as wastelands and unhealthy environments helped promote their degradation because _______.a.mangrove forests are unproductive, unhealthy habitatsb.people did not feel it was necessary to preserve themc.mangrove forests do not need to be preservedd.all of the above

Which is a requirement for natural selection to occur?

Yellowstone National Park has an average of about 4500 bison living in it. The park covers 3472 square miles. What is the population density of bison living in Yellowstone?a.1.3 bison/mib.16 bison/mic.77 bison/mid.0.77 bison/mi

Scientists use specific levels of organization to analyze the biosphere. Which level of organization describes a school of anchovies? School of Anchovies

Which biomes receive less than 100 cm of rain each year? Select three options.tropical rain foresttemperate rain forestdeserttundragrassland

Which of the following is not a trait of mangrove trees? a. They excrete salt through their leaves. b. They do not tolerate highly saline environments. c. They have two types of specialized roots. d. They absorb oxygen through their roots. Please select the best answer from the choices provided

Changes to the global climate could include _______.a.changes to temperatureb.changes to pressurec.changes to precipitationd.all of the above

Which of the following is true of coral? a. It is located in deep sea regions. b. It supports few species. c. It is composed of a single large and complex coral organism. d. It is composed of thousands of individual coral organisms. Please select the best answer from the choices provided

Fluctuations in the phosphorus cycle in aquatic ecosystems _______.a.can lead to changes in the growth rates of aquatic populationsb.are never caused by human impact on the environmentc.lead to a decrease in the amount of phosphorus found in sedimentd.never occur naturally

All wetlands are considered freshwater ecosystems.

A balance in abiotic factors is vital to healthy ecosystems.

Ground squirrels inhabit African savannas. Which adaptation helps the ground squirrels live in this biome?

Which is a limiting nutrient for plant growth?

Which of the following about the ozone layer is not true?a.The ozone layer is formed in the stratosphere.b.The ozone layer helps sustain life by absorbing a large amount of incoming UV radiation.c.Ozone in the troposphere is beneficial to living organisms.d.Depletion of the ozone layer can lead to an increase in skin cancer.

Pollution in the _______ will have the greatest effect on human health.a.troposphereb.stratospherec.mesosphered.thermosphere

How can an increase in biodiversity lead to an increase in ecosystem stability?a.A more biodiverse ecosystem is not subject to change.b.A more biodiverse ecosystem has a higher chance of adapting to species changes.c.A more biodiverse ecosystem has fewer species types to balance.d.A more biodiverse ecosystem is subject to fewer natural disasters.

Which of the following statements about biodiversity is true? a. Changes to biodiversity always positively affect an ecosystem. b. Changes to biodiversity always negatively affect an ecosystem. c. Changes to biodiversity can positively and negatively affect an ecosystem. d. Changes to biodiversity never affect an ecosystem. Please select the best answer from the choices provided

Which of the following is not a way in which wetlands filter water?a.nutrient absorptionb.oil absorptionc.sediment trappingd.bacterial absorption

Which of the following statements about wetlands is not true?a.There is more than one type of wetland.b.Wetlands can contain either freshwater or saltwater.c.Wetlands exist in a small range of climates.d.Wetlands support a variety of organisms.

R-selected species have a short life span and an early reproduction cycle.