What roles do photosynthesis and cellular respiration have in an ecosystem?
What will be an ideal response?
Ans: in photosynthesis and cellular respiration CO2 and oxygen are produced and consumed by organisms within the ecosystem
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Geothermal energy is energy in the form of heat from
A) the interior of the earth. B) the sun. C) biomass. D) friction from the earth's plates. E) recycled heat from factories.
Viscosity (i.e., resistance to flow) of magma is controlled by factors different from those affecting the explosivity of volcano eruption.
a. true b. false
A ________ dune is deeply convex and its horns point upwind.
A. longitudinal B. parabolic C. transverse D. barchan E. bajada
Which of the following statements is supported by the graph?
A) As the population of a city increases, automobile use also increases. B) Rapidly growing cities have higher rates of automobile use than cities with more stable populations. C) As urban sprawl increases, automobile use also increases. D) Per capita automobile use is higher in wealthy nations than in poor nations.