Unit Test — Unit test Answers

Which of the following is not a way that nonnative organisms are introduced to new aquatic ecosystems related to commerce?a.cargo ship hullsb.recreational boatsc.escape from aquariumsd.migration

Which of the following is a way that humans impact rivers and streams?a.pollutionb.damsc.floodingd.all of the above

Fish that feed on sediment will most likely be found in _______ rivers.a.shallowb.narrowc.deepd.fast-moving

The principle difference between where salt marshes and mangrove forests grow is _______.a.the salinity of the waterb.the amount of sunlight the plants receivec.the intensity of the waves along the coastd.the extent of human development in the area

Coral reef ecosystems support over a million different species. Please select the best answer from the choices provided

Which of the following did not allow researchers to further explore below the ocean’s surface?a.ROV’sb.Alvinc.Palomaresd.Bathysphere

Which best matches objects that a scientist would include on a list describing a forest ecosystem?

Riparian zones can reduce the impact of water pollution.

What characteristic is important for plants found in saltwater wetlands?a.tolerance to high temperaturesb.tolerance to salinityc.a range of climate zonesd.all of the above

Earth scientists have concluded that the methods of harnessing energy that have been used over the past two centuries, such as the burning of fossil fuels, are causing climates around the world to change more quickly and suddenly than ever before in human history. Evidence includes increased air temperatures, rising sea levels, and the shrinking of glaciers in Greenland, Alaska, and other regions of Earth. The most complex level of organizational hierarchy that climate change could potentially affect is Earth’s

The effects of agriculture and industry can be more harmful with the further loss of wetlands.

Gila monsters are very well adapted to their homes. They have thick skin to prevent water loss and they burrow to escape the heat during the day. A Gila monster would most likely live in which biome?

Which of the following is not a characteristic of rivers and streams?a.vary in sizeb.mainly saltwaterc.part of the water cycled.flow toward other bodies of water

Which of the following is not an example of mechanical control of nonnative species?a.pullingb.inspectionsc.net barriersd.mowing

The marine biome _______.a.is a large ecosystem, but not larger than some terrestrial ecosystemsb.is characterized by four different zonesc.has little species diversityd.covers a small portion of the Earth’s surface

What is the difference between a community and a population?

Which of the following statements about coral reef preservation efforts is true?a.In order to preserve coral reefs, all aquarium trade in coral reef organisms must end.b.Legislation has had no impact on coral reef preservation efforts.c.Various preservation methods have had some positive impact on coral reef preservation.d.Education of fishermen has eliminated all coral reef loss.

Biomes on Earth have exhibited changes throughout history that have been caused by a variety of factors. Over the past 50 years, the amount of tropical rainforest acreage found throughout the world has decreased from 14.8 billion acres to 8.6 billion acres due to deforestation. What factor is likely most responsible for the changes observed in the world’s rainforests? a. volcanic activity b. human activity c. temperature changes d. solar eclipses Please select the best answer from the choices provided

Which of the following is a characteristic typically not used to classify biomes? a. climate b. type of vegetation c. human activity d. geography Please select the best answer from the choices provided

Eutrophication is caused by _______.a.an increase in nutrientsb.a decrease in nutrientsc.the introduction of new species of animalsd.the introduction of new species of plants