Question 1

Usually,a river _ at its source compared to farther downstream.

Accepted Answer

At its source, a river typically has less phytoplankton due to the fast-moving, clear, and nutrient-poor waters, whereas downstream, the water slows, becomes richer in nutrients, and supports more phytoplankton growth.

Question 2

A sperm whale in the middle of the Atlantic Ocean is in which oceanic zone?

Accepted Answer

The middle of the Atlantic Ocean is a part of the open ocean, so the sperm whale would be in the pelagic zone which includes all the water that is not close to the bottom or near the shore.

Question 3

The dominant herbivores in savannas are

Accepted Answer

C

Question 4

Which of the following factors is fundamentally responsible for the character of arctic tundra soils?

Accepted Answer

Permafrost is permanently frozen soil, which greatly affects the character of arctic tundra soils. It causes poor drainage, limits root growth, and keeps organic materials from decomposing, leading to the formation of a layer of organic matter on top of the permafrost called the active layer. This layer thaws during the brief Arctic summers and allows some vegetation to grow.

Question 5

In terms of global air circulation,the tropics are a region where air

Accepted Answer

In the tropics, warm air rises and cools, leading to condensation and precipitation, which results in frequent rainfall.

Question 6

Which of the following biomes is dominated by coniferous trees adapted to surviving long,harsh winters and short,wet summers?

Accepted Answer

Coniferous forests, also known as taiga or boreal forests, are dominated by coniferous trees that are adapted to surviving long, harsh winters and short, wet summers. This biome is found in the northern hemisphere, primarily in Canada, Russia, and Scandinavia.

Question 7

When people speak of the "rain shadow" of the California Coast Range,they are referring to the

Accepted Answer

The term "rain shadow" refers to the area of reduced rainfall on the leeward side of a mountain range. In the case of the California Coast Range, the western flank receives the majority of precipitation from Pacific storms, while the eastern flank and adjacent lowlands are in the rain shadow and receive much less rainfall.

Question 8

Species in widely separated biomes often appear to display similar characteristics because of

Accepted Answer

Similar characteristics in species in widely separated biomes are often due to convergent evolution, where unrelated species evolve similar traits due to similar environmental pressures.

Question 9

Which ocean zone describes the interface between ocean and land?

Accepted Answer

The intertidal zone is the area where the ocean meets the land, and it is often rocky with tidepools and exposed to air during low tide. It is also known as the littoral zone or the intertidal area.

Question 10

Which of the following options correctly pairs a biome and its characteristics?

Accepted Answer

The tundra is characterized by very cold winters and only the upper layer of the soil thaws during the summer, which is known as permafrost.

Question 11

The adaptations of pronghorns

Accepted Answer

The adaptation of pronghorns to open country, such as their incredible speed and binocular vision, would not be advantageous in a densely forested environment where visibility is limited. Therefore, their adaptations are not suitable for every type of environment, contradicting choices A, B, and C.

Question 12

You are reading the journal of an amateur naturalist who visited the Sonoran Desert in the last century.Which of his descriptions of desert plants would you question?

Accepted Answer

Annual plants typically produce many seeds to ensure survival, as they complete their life cycle in one season. Producing only one large seed would be unusual for an annual plant.

Question 13

Which of the following statements about temperate broadleaf forests is true?

Accepted Answer

Oak, hickory, birch, beech, and maple are common trees in temperate broadleaf forests. The other statements are not accurate. Temperate broadleaf forests have a wider range of temperatures over the course of a year than tropical rain forests, and they generally have richer soil than other forest ecosystems.

Question 14

Which of the following is characteristic of the chaparral biome?

Accepted Answer

The answer of Which of the following is characteristic of...

Question 15

Which of the following environmental factors usually has the greatest direct effect on an organism's rate of water loss by evaporation?

Accepted Answer

Wind has the greatest direct effect on an organism's rate of water loss by evaporation as it increases the rate of evaporation by increasing the movement of air molecules around the organism, leading to greater moisture loss from the organism's surface. Soil type, fires, hurricanes, tornadoes, and barometric pressure may indirectly affect water loss through their impact on the availability of water or the environment in which the organism lives, but they do not directly impact the rate of evaporation from the surface of the organism itself.

Question 16

Which of the following has the greatest impact on the global water cycle?

Accepted Answer

Human destruction of forests leads to deforestation, which has a significant impact on the global water cycle. Trees play a crucial role in the water cycle by absorbing and releasing water into the atmosphere through evapotranspiration. Deforestation disrupts this process, leading to decreased rainfall, increased soil erosion, and changes in river flow patterns. Overall, deforestation has a substantial impact on the global water cycle and can lead to severe environmental consequences.

Question 17

Except near hydrothermal vents,the communities of the oceanic aphotic zone get their energy mainly from

Accepted Answer

The aphotic zone of the ocean is the part which does not receive any sunlight. Therefore, photosynthesis cannot occur, and the primary production (or energy) for this zone comes from the organic matter that sinks down from the photic zone above, i.e., A. Option B and C are not possible as there is no sunlight, so no photosynthesis can happen. Although sulfur bacteria can be found near hydrothermal vents, it is not the primary source of energy for the rest of the aphotic zone. So, option D is incorrect.

Question 18

The factor(s)that help to perpetuate temperate grasslands,such as the American prairies,and prevent them from becoming woodlands include

Accepted Answer

Periodic drought and fires are important factors in preventing temperate grasslands from becoming woodlands. Fires clear out woody plants that would otherwise compete with grasses for resources and also stimulate the growth of new grasses. Drought also limits the growth of woody plants and encourages the growth of grasses, which are better adapted to dry conditions. The other choices (A, C, and D) are either not relevant or not accurate.

Question 19

If you travel from west to east through Ecuador,you will pass through tundra,taiga,temperate forest,and tropical forest.Which of the following climatic factors remains constant on such a trip?

Accepted Answer

Day length remains relatively constant as you travel in any direction along the equator. The other factors, such as average rainfall, soil type, and maximum temperature, can vary significantly as you pass through different biomes and climatic zones.

Question 20

Which of the following statements about coniferous forests is true?

Accepted Answer

Coniferous forests, also known as taiga, are characterized by long, cold winters and short, moist summers. Precipitation in these forests may be considerable, but it typically falls in the form of snow rather than rain. The soil in coniferous forests is often nutrient-poor due to the slow decomposition of organic material in the cold climate. While coniferous forests are not the largest terrestrial biome, they cover vast areas of land in North America, Europe, and Asia.

Quiz 34: The Biosphere: an Introduction to Earths Diverse Environments