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a biomass pyramid of an ecosystem is shown. which statement provides the best explanation for the difference in biomass of organisms found at each trophic level?

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A pyramid of biomass is based on the number of organisms at each trophic level

Click here👆to get an answer to your question ✍️ A pyramid of biomass is based on the number of organisms at each trophic level

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A

B

False

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Correct option is B)

The pyramidal representation of trophic levels of different organisms based on their ecological position [producer to final consumer] is called as an ecological pyramid. Pyramid of biomass is usually determined by collecting all organisms occupying each trophic level separately and measuring their dry weight. The biomass of a species is expressed in terms of fresh or dry weight. Measurement of biomass in terms of dry weight is more accurate. Each trophic level has a certain mass of living material at a particular time called as the standing crop.

So the given statement is false'.

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QUIZ

B12C

B12C 41%

298 9th Biology Emilie Olivier 3 years

15 Qs

1. Multiple-choice 30 seconds Q.

Which of the following are missing from the food web shown above?

answer choices producer decomposers omnivores predators 2. Multiple-choice 30 seconds Q.

The Texas blind salamander (Eurycea rathbuni) lives in the Edwards Aquifer region around San Marcos. Along with other species the salamander lives in total darkness in the underground crevices and caves of the aquifer region. The table lists some of the organisms that live in this environment and their food sources. In the energy pyramid for these aquifer cave dwellers, which of the following would be placed at the bottom?

answer choices snails blind shrimp protozoa

Texas blind salamander

3. Multiple-choice 30 seconds Q.

A marine ecosystem is represented below. What is lost to the environment at each of the trophic levels of this ecosystem?

nutrients from the soil

living space for the organisms

food sources heat 4. Multiple-choice 30 seconds Q.

A terrestrial food web is shown below. Which of the following lists only organisms that are secondary consumers in this food web?

mice, rabbits, herbivorous insects, and squirrels

predaceous insects, toads, spiders, and foxes

spiders, foxes, owls, hawks, and snakes

insectivorous birds, seed eating birds, owls, and hawks

5. Multiple-choice 30 seconds Q.

The food web shows the flow of energy through a sagebrush steppe ecosystem. Which of these organisms are in a trophic level that receives a larger percentage of the energy captured by the producers than the percentage received at the bats trophic level?

answer choices mountain lions snakes hawks ground squirrels 6. Multiple-choice 30 seconds Q.

A student is asked to draw a food web in which teh same organism is a primary consumer as well as a secondary consumer. How should the organism be represented in the food web?

the organism must have an arrow pointing from it to a tertiary consumer and another arrow pointing from it to a decomposer

the organism must have an arrow pointing from it to a secondary consumer and anther arrow pointing to it from the top predator

the organism must have an arrow pointing to it from a producer and another arrow pointing to it from a primary consumer

the organism must have an arrow pointing from it to a primary consumer and another arrow pointing away from it to a decomposer

7. Multiple-choice 30 seconds Q.

The amount of energy the producers in this energy pyramid provide the primary consumers is 54,000 joules. From this amount 540 joules are provided to the tertiary consumers. Based on this model, how much of the energy was provided to secondary consumers?

answer choices 53, 460 J 5,400 J 540 J 54 J 8. Multiple-choice 30 seconds Q.

Part of the hydrothermal vent food web is represented in the diagram. Which organisms are both secondary and tertiary consumers in this food web?

chemosynthetic bacteria and amphipods

zooplankton and mussels

ratfish and octopuses

galatheid crabs and zoarcid fish

9. Multiple-choice 30 seconds Q.

The energy pyramid below shows the energy made available by producers. Based on the energy flow between trophic levels in an energy pyramid, how much energy would be expected to be found at the secondary consumer level in this pyramid?

answer choices 100 J 500 J 1,000 J 50 J 10. Multiple-choice 30 seconds Q.

The diagram shows a partial East Texas food web. Which table correctly classifies the organisms?

answer choices 11. Multiple-choice 30 seconds Q.

The table lists some organisms found in a swamp ecosystem and their sources of energy. When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

answer choices grass carp american alligator eastern mud turtle great blue heron 12. Multiple-choice 30 seconds Q.

A partial meadow food web is shown. Based on this food web, which organisms are direct sources of energy for secondary consumers?

answer choices aphid bird rabbit ladybug fox dragonfly frog butterfly berries mouse snake hawk 13. Multiple-choice 30 seconds Q.

What would be the most likely effect of a wildfire that burned a large area of a forest?

More sugars and starches would be available for animals in the area

The availability of fossil fuels for use by industries in the area would be reduced

Less carbon dioxide would be removed from the atmosphere in the area by plants

An increase in animal respiration would increase the release of carbon dioxide in the area

14. Multiple-choice 30 seconds Q.

A partial Texas food web is shown. The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?

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biology semester review Flashcards

Start studying biology semester review. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

biology semester review

Which answer choice best describes a community?

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Different species of lizards occupying the same niche in a desert

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Which components bond with adenine in a section of double-stranded DNA?

1. phospate 2. Ribose sugar

3. Deoxyribose sugar

4. Uracil 5. Thymine 6. adenine 7. Guanine 8. Cytosine

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3 and 5 only

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1/40 Created by mimi1mc09

Terms in this set (40)

Which answer choice best describes a community?

Different species of lizards occupying the same niche in a desert

Which components bond with adenine in a section of double-stranded DNA?

1. phospate 2. Ribose sugar

3. Deoxyribose sugar

4. Uracil 5. Thymine 6. adenine 7. Guanine 8. Cytosine 3 and 5 only

What would be the most likely effect of a wildfire that burned a large area of a forest?

Less carbon dioxide would be removed from the atmosphere in the area by plants

Which cell that was viewed is most likely a prokaryote?

Cell X

Students are modeling mRNA during the process of protein synthesis. Which answer choice correctly describes the model of the mRNA strand being transcribed?

The mRNA strand is complementary to the DNA template strand; however , uracil instead of thymine is paired with adenine

What is a result of preventing spindle fibers from forming?

Mitotic division stops in metaphase and cannot proceed to anaphase

Which human activity would most likely decrease the ability of the salamanders to survive?

Increasing water consumption that decreases the flow of clean water from the spring that feed the river

Which of these describes the similar functions of capsids and nuclear membranes?

Both protect genetic information for the structures

What is the most likely result if the shape of the enzyme changes?

The enzyme will no longer be able to catalyze the reaction with the substrate

Which description best identifies this type of cellular transport?

Active transport, because energy is being used to move molecules against the concentration gradient

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Verified questions

BIOLOGY

Evaluate the difficulties with reintroduction programs using captive-born animals.

Data for Barry Computer Co. and its industry averages follow. a. Calculate the indicated ratios for Barry. b. Construct the DuPont equation for both Barry and the industry. c. Outline Barry’s strengths and weaknesses as revealed by your analysis. d. Suppose Barry had doubled its sales as well as its inventories, accounts receivable, and common equity during 2016. How would that information affect the validity of your ratio analysis? $$\begin{matrix} \text{Barry Computer Company:} & \text{Balance Sheet as of December 31, 2016 (in Thousands)}\\ \text{Cash} & \text{\ 77.500} & \text{Accounts payable} & \text{\ 129.000}\\ \text{Receivables} & \text{336.000} & \text{Other current liabilities} & \text{117.000}\\ \text{Inventories} & \text{241.500} & \text{Notes payable to bank} & \text{84.000}\\ \text{Total current assets} & \text{\ 655.000} & \text{Total current liabilities} & \text{\ 330.000}\\ \text{ } & \text{ } & \text{Long-term debt} & \text{256.500}\\ \text{Net fixed assets} & \text{292.500} & \text{Common equity} & \text{361.000}\\ \text{Total assets} & \text{\ 947.500} & \text{Total liabilities and equity} & \text{\ 947.500}\\ \end{matrix}$$ $$\begin{matrix} \text{Barry Computer Company:} & \text{Balance Sheet as of December 31, 2016 (in Thousands)}\\ \text{Sales} & \text{ } & \text{\ 1.607.500}\\ \text{Costs of goods sold} & \text{ }\\ \text{Materials} & \text{\ 717.000}\\ \text{Labor} & \text{453.000}\\ \text{Heat, light, and power} & \text{68.000}\\ \text{Indirect labor} & \text{113.000}\\ \text{Deprecation} & \text{41.500} & \text{1.392.500}\\ \text{Gross profit} & \text{ } & \text{\ 215.000}\\ \text{Selling expenses} & \text{ } & \text{115.000}\\ \text{General and administrative expenses} & \text{ } & \text{30.000}\\ \text{Earnings before interest and taxes (EBIT)} & \text{ } & \text{\ 70.000}\\ \text{Interest expense} & \text{ } & \text{24.500}\\ \text{Earnings before taxes (EBT)} & \text{ } & \text{\45.500}\\ \text{Federal and state income taxes (40\\%)} & \text{ } & \text{18.200}\\ \text{Net income} & \text{ } & \text{\ 27.300}\\ \end{matrix}$$ $$\begin{matrix} \text{Ratio} & \text{Barry} & \text{Industry Average}\\ \text{Current} & \text{ } & \text{2.0 }{\times}\\ \text{Quick} & \text{ } & \text{1.3 }{\times}\\ \text{Days sales outstanding} & \text{ } & \text{35 days}\\ \text{Inventory turnover} & \text{ } & \text{6.7 }{\times}\\ \text{Total assets turnover} & \text{ } & \text{3.0 }{\times}\\ \text{Profit margin} & \text{ } & \text{1.2\\%}\\ \text{ROA} & \text{ } & \text{3.6\\%}\\ \text{ROE} & \text{ } & \text{9.0\\%}\\ \text{ROIC} & \text{ } & \text{7.5\\%}\\ \text{TIE} & \text{ } & \text{3.0 }{\times}\\ \text{Debt/Total capital} & \text{ } & \text{47.0\\%}\\ \end{matrix}$$