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1. Carbon cycles through the ecosystembetween the atmosphere, organisms (such as producers, herbivores,and carnivores), and decomposers. This natural cycle maintains asomewhat constant level of carbon in the atmosphere. The burning offossil fuels releases carbon into the cycle that has been trappedinside the earth. How does this affect the cycle and what problemscan this cause?

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Tod Thiel
Tod ThielLv2
28 Sep 2019
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Related questions

Which of the following provides evidence for evolution?

All of these answers are correct
Comparing DNA sequences between species
Looking at the geographic distribution of similar species
Comparing similarities in embryonic development between species
Analyzing transitional fossils

Which one of the following statements is true?

Natural selection works on non-heritable traits.
Mutations only give rise to harmful traits.
Natural selection works on variation already present in a population.
Individuals evolve through natural selection.

Which one of the following can create new alleles?

Genetic drift
Natural selection
Gene flow
Mutation

Which of the following is true concerning evolution?

An individual can evolve
Genetic drift is a non-random part of natural selection
An organism's fitness is determined by how long it survives
Natural selection occurs through a change in allele frequency

All living things need carbon. How does carbon enter the living portion of an ecosystem?

Atmospheric carbon dioxide taken in by photosynthesis.
Atmospheric carbon dioxide taken in by soil bacteria.
Elemental carbon taken in by plant roots.
Elemental carbon taken in by cellular respiration.
Elemental carbon taken in by cellular transpiration.

The burning of fossil fuels:

Releases excess carbon dioxide into the atmosphere.
Removes pollutants from the atmosphere.
Was developed by scientists to combat global climate change.
Has no effect on the carbon cycle.
Is good for the environment

__________ conducts water and dissolved minerals from the __________ to the ___________.

Phloem; roots; shoots
Xylem; roots; shoots
Phloem; shoots; roots
Xylem; shoots; roots

What is a disadvantage of growing traditional crops such as corn, soy or sugar cane for making biofuel?

they require lots of land and fresh water
they take carbon dioxide out of the atmosphere
they release oxygen into the atmosphere
they release water through their stomata

______ is the source of the oxygen gas released by a photosystem.

NADPH
H2O
C6H12O6
CO2
Chlorophyll

Through what structure(s) do plants obtain most of their water?

interior cells
stems
leaves
roots
stomata

Question 1.1. Stanley Miller performed anexperiment in which he simulated the atmosphere of the early Earth,added a spark, and obtained simple organic molecules after a periodof time. (Points : 0.5)
true
false
Question 2.2. The observation that whales haveflippers best matches with which characteristic? (Points :0.5)
members of a speciesvary

struggle forexistence

survival of thefittest

adaptation to theenvironment

competition of limitedresources
Question 3.3. Which of these does NOT describethe primitive atmosphere? (Points : 0.5)
water vapor

plenty of freeoxygen
formed by volcanicgases
no flying creatures
had many sources ofenergy
Question 4.4. In the water cycle, all watereventually returns to __________ because of gravity. (Points :0.5)
the sea
groundwater
lakes
atmosphere as vapor
rivers
Question 5.5. About __________ of the energyavailable at a particular trophic level is incorporated into thetissues at the next trophic level. (Points : 0.5)
1%
5%
10%
25%
30%
Question 6.6. What type of heterotrophs(consumers) grazes directly on plants or algae? (Points : 0.5)
autotrophs
carnivores
omnivores
herbivores
pescavores
Question 7.7. Which of the following describesbiotic potential? (Points : 0.5)
maximum population theenvironment can support

maximum growth rate underideal conditions

maximum birthrate for aspecies

maximum resource usagefor a population

minimum mortality for aspecies
Question 8.8. Select the practice that willNOT contribute to sustainability in agriculture. (Points :0.5)
over crops andmultipurpose trees

integrated pestmanagement

annual addition ofpesticides

precision farmingtechniques
Question 9.9. Which of the following is arenewable resource? (Points : 0.5)
coal
mineral
land
water
natural gas
Question 10.10. Select the practice that willNOT contribute to sustainability in urban areas. (Points :0.5)
greenbelts and greenroofs

efficient publictransportation

plant bluegrass lawnsrather than native grasses

recycling of businessequipment

1. Studies over many years and by many different researchers have shown that only 10% of the energy captured by photosynthesis is transferred to the next trophic level, primary consumers. Similarly, the transfer of energy between any trophic level and the next has been shown to be 10% (Infographic 22.4). The biogeochemical cycles that continually renew supplies of clean water, oxygen, essential nutrients (nitrogen and phosphorus), and carbon also are powered by the sun’s energy (Infographic 23.9). The amount of energy delivered to the Earth remains nearly the same from year to year and is called the solar constant. Explain how energy flow and the rates of the biogeochemical cycles relate to the carrying capacity of an ecosystem. [45]

2. Prepare a schematic of the hydrologic cycle that shows the major sinks, flows, drivers and processes in the cycle. Indicate the relative amounts of freshwater and saltwater and briefly explain why all the Earth’s water has not become salty. [40]

3. If the Earth’s water supply is finite, how can global warming cause sea levels to rise? Hint: There are several mechanisms but don’t fall into a common trap. Do this experiment! Put ice in a glass and fill the glass till it is ready to overflow. Set the glass on a table and let the ice melt. What did you observe? [15]

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