A) rarely affect nutrient cycles. B) can alter nutrient cycles on local and global scales. C) tend to cause only local changes in nutrient cycles. D) generally improve nutrient cycling in ecosystems. A) rarely affect nutrient cycles. B) can alter nutrient cycles on local and global scales. C) tend to cause only local changes in nutrient cycles. D) generally improve nutrient cycling in ecosystems.

Exam 21: Ecosystems

Should the scientific community accept,without questions,Boyce,Worm,and Lewis's hypothesis that Earth's oceans are losing 500 million tons of phytoplankton per year? Support your answer.

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Question 1

Correct Answer:

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No,the scientific community should not unquestioningly accept Boyce,Worm,and Lewis's hypothesis that Earth's oceans are losing 500 million tons of phytoplankton per year. Decisions about how the oceans' resources are used and cared for are based on what we know about net primary productivity (NPP)in the oceans. If those decision are based on inaccurate data,then it is difficult to make good decisions. Multiple research teams have uncovered data that disagrees with the data shared by Boyce,Worm,and Lewis. It is important for the scientific community to critically examine all of the data to determine which set,or combinations of data,most accurately depict the NPP of Earth's oceans.

Match each term to its correct description below. -This biome is dominated by trees and shrubs adapted to relatively rich soil; snowy winters; and moist,warm summers.With oak,maple,hickory,beech,and elm,this biome displays good diversity.Squirrels,rabbits,deer,raccoons,beavers,bobcats,mountain lions,bears,and many amphibians and reptiles constitute the consumer community.

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Question 2

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On what four factors does net primary productivity rely,and what terrestrial ecosystem is the most productive because of these factors?

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Question 3

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The generally most productive terrestrial ecosystems are tropical forests because they bring together an efficient combination of the four factors affecting net primary productivity: plenty of water and sunlight with moderate to warm temperatures.Much of the needed soil nutrients are sequestered within the vegetation of this ecosystem.

Strict vegetarians,or vegans,would be considered ________ consumers in an energy pyramid.

(Short Answer)

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Question 4

Match each term to its correct description below. -This biome is commonly found in both temperate and tropical latitudes.It does not receive enough moisture to support vigorous tree growth,so it is dominated by grasses and herbaceous plants.Burrowing rodents like voles and prairie dogs are common.

(Multiple Choice)

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Question 5

Assessing the overall net primary productivity (NPP)of an ecosystem is important in determining how an ecosystem works,because ________ capture influences the amount of food available to other organisms in the ecosystem.

(Short Answer)

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Question 6

Since 1931,the phytoplankton biomass in the Northeast Atlantic Ocean has been monitored by the __________ (CPR)survey where a special instrument is pulled through the ocean by commercial fishing vessels to collect millions of sample of plankton.

(Short Answer)

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Question 7

There are 5 million kcal of energy stored in grain that could be fed either to chickens or humans.A small village of starving people need to be fed.The most efficient way to feed the majority of the villagers is to feed

(Multiple Choice)

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Question 8

A decline in phytoplankton could affect the climate of Earth by altering the cycle by moving less from the atmosphere into phytoplankton tissues.Since is a greenhouse gas,more of it in the atmosphere could contribute to global warming.

(Multiple Choice)

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Question 9

Which of the following groups of organisms would NOT be considered consumers?

(Multiple Choice)

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Question 10

Areas of the ocean that are very cloudy due to large amounts of stirred sediment or eroded soil are likely to experience ________ productivity levels.

(Multiple Choice)

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Question 11

Human activities

(Multiple Choice)

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Question 12

There are 5 million kcal of energy stored in grain that could be fed either to beef cattle or humans.A farmer chooses to feed the grain to the cattle to fatten them up for human consumption.How many kcal would now be available as beef to feed the humans?

(Multiple Choice)

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Question 13

Tuna are predatory fish that consume smaller,carnivorous fish that have fed on zooplankton.The zooplankton had fed on phytoplankton.When a human eats tuna,that person is the ________ trophic level of the food chain.

(Multiple Choice)

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Question 14

Ecologists use a(n)________ to represent the amount of energy available to organisms in an ecosystem.

(Short Answer)

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Question 15

The primary contribution of decomposers to an ecosystem occurs when they

(Multiple Choice)

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Question 16

The chemical and physical components of an ecosystem are considered to be ________ or nonliving.

(Multiple Choice)

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Question 17

Which of the following are likely biotic components of a desert ecosystem?

(Multiple Choice)

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Question 18

Propose an explanation for why whales swimming up and down through the water column in the ocean ecosystem can help remove tons of carbon dioxide from the atmosphere each year.

(Essay)

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Question 19

The primary difference between consumers and decomposers is that obtain their nutrients by eating ,while decomposers obtain their nutrients from .

(Multiple Choice)

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Question 20

Showing 1 - 20 of 87

Should the scientific community accept,without questions,Boyce,Worm,and Lewis's hypothesis that Earth's oceans are losing 500 million tons of phytoplankton per year? Support your answer.

On what four factors does net primary productivity rely,and what terrestrial ecosystem is the most productive because of these factors?

Strict vegetarians,or vegans,would be considered ________ consumers in an energy pyramid.

Match each term to its correct description below. -This biome is commonly found in both temperate and tropical latitudes.It does not receive enough moisture to support vigorous tree growth,so it is dominated by grasses and herbaceous plants.Burrowing rodents like voles and prairie dogs are common.

Assessing the overall net primary productivity (NPP)of an ecosystem is important in determining how an ecosystem works,because ________ capture influences the amount of food available to other organisms in the ecosystem.

Since 1931,the phytoplankton biomass in the Northeast Atlantic Ocean has been monitored by the __________ (CPR)survey where a special instrument is pulled through the ocean by commercial fishing vessels to collect millions of sample of plankton.

There are 5 million kcal of energy stored in grain that could be fed either to chickens or humans.A small village of starving people need to be fed.The most efficient way to feed the majority of the villagers is to feed

A decline in phytoplankton could affect the climate of Earth by altering the cycle by moving less from the atmosphere into phytoplankton tissues.Since is a greenhouse gas,more of it in the atmosphere could contribute to global warming.

Which of the following groups of organisms would NOT be considered consumers?

Areas of the ocean that are very cloudy due to large amounts of stirred sediment or eroded soil are likely to experience ________ productivity levels.

Human activities

There are 5 million kcal of energy stored in grain that could be fed either to beef cattle or humans.A farmer chooses to feed the grain to the cattle to fatten them up for human consumption.How many kcal would now be available as beef to feed the humans?

Tuna are predatory fish that consume smaller,carnivorous fish that have fed on zooplankton.The zooplankton had fed on phytoplankton.When a human eats tuna,that person is the ________ trophic level of the food chain.

Ecologists use a(n)________ to represent the amount of energy available to organisms in an ecosystem.

The primary contribution of decomposers to an ecosystem occurs when they

The chemical and physical components of an ecosystem are considered to be ________ or nonliving.

Which of the following are likely biotic components of a desert ecosystem?

Propose an explanation for why whales swimming up and down through the water column in the ocean ecosystem can help remove tons of carbon dioxide from the atmosphere each year.

The primary difference between consumers and decomposers is that obtain their nutrients by eating ,while decomposers obtain their nutrients from .

The Nature of Science

Evaluating Scientific Claims

Chemistry of Life

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Bacteria and Archaea

Plants, Fungi, and Protists

Animals and Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Filters

Exam 21: Ecosystems

Should the scientific community accept,without questions,Boyce,Worm,and Lewis's hypothesis that Earth's oceans are losing 500 million tons of phytoplankton per year? Support your answer.

On what four factors does net primary productivity rely,and what terrestrial ecosystem is the most productive because of these factors?

Strict vegetarians,or vegans,would be considered ________ consumers in an energy pyramid.

Match each term to its correct description below. -This biome is commonly found in both temperate and tropical latitudes.It does not receive enough moisture to support vigorous tree growth,so it is dominated by grasses and herbaceous plants.Burrowing rodents like voles and prairie dogs are common.

Assessing the overall net primary productivity (NPP)of an ecosystem is important in determining how an ecosystem works,because ________ capture influences the amount of food available to other organisms in the ecosystem.

Since 1931,the phytoplankton biomass in the Northeast Atlantic Ocean has been monitored by the __________ (CPR)survey where a special instrument is pulled through the ocean by commercial fishing vessels to collect millions of sample of plankton.

There are 5 million kcal of energy stored in grain that could be fed either to chickens or humans.A small village of starving people need to be fed.The most efficient way to feed the majority of the villagers is to feed

A decline in phytoplankton could affect the climate of Earth by altering the ________ cycle by moving less ________ from the atmosphere into phytoplankton tissues.Since ________ is a greenhouse gas,more of it in the atmosphere could contribute to global warming.

Which of the following groups of organisms would NOT be considered consumers?

Areas of the ocean that are very cloudy due to large amounts of stirred sediment or eroded soil are likely to experience ________ productivity levels.

Human activities

There are 5 million kcal of energy stored in grain that could be fed either to beef cattle or humans.A farmer chooses to feed the grain to the cattle to fatten them up for human consumption.How many kcal would now be available as beef to feed the humans?

Tuna are predatory fish that consume smaller,carnivorous fish that have fed on zooplankton.The zooplankton had fed on phytoplankton.When a human eats tuna,that person is the ________ trophic level of the food chain.

Ecologists use a(n)________ to represent the amount of energy available to organisms in an ecosystem.

The primary contribution of decomposers to an ecosystem occurs when they

The chemical and physical components of an ecosystem are considered to be ________ or nonliving.

Which of the following are likely biotic components of a desert ecosystem?

Propose an explanation for why whales swimming up and down through the water column in the ocean ecosystem can help remove tons of carbon dioxide from the atmosphere each year.

The primary difference between consumers and decomposers is that ________ obtain their nutrients by eating ________,while decomposers obtain their nutrients from ________.

The Nature of Science

Evaluating Scientific Claims

Chemistry of Life

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Bacteria and Archaea

Plants, Fungi, and Protists

Animals and Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Filters

A decline in phytoplankton could affect the climate of Earth by altering the cycle by moving less from the atmosphere into phytoplankton tissues.Since is a greenhouse gas,more of it in the atmosphere could contribute to global warming.

The primary difference between consumers and decomposers is that obtain their nutrients by eating ,while decomposers obtain their nutrients from .