How does carbon enter the atmosphere? What effect does it have on Earth? How does it cycle back for use in biological components?
· Carbon enters the atmosphere though the respiration of all living things as carbon dioxide. Volcanic eruptions and the burning of fossil fuels also send carbon back to into the atmosphere.
· An increase of carbon dioxide into the atmosphere creates an increase in surface temperatures. This is due to the "greenhouse effect."
· Photosynthetic organisms capture sunlight to fix carbon dioxide into organic molecules that can be used.
· When primary consumers eat producers, they are able to obtain and use some of the converted carbon. It can be incorporated into an animal's body for growth. Some of the carbon will be respired out or excreted by the organism.
· Dissolved organic carbon is excreted back into seawater. Then the whole cycle starts over again.
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What is typically occurring when magmatism occurs far away from plate boundaries?
a. new oceanic crust is created at mid-ocean ridges b. large volcanoes are built above subduction zones c. some type of thermal disturbance is occuring in the mantle d. all of these
What statement most accurately describes the theory of seafloor spreading?
A)Subduction zones produce oceanic crust that moves away from these zones by seafloor spreading toward mid-oceanic ridges where it is consumed. B)Oceanic crust continuously forms across the seafloor and is moved by subduction zones toward mid-oceanic ridges where it is consumed. C)Oceanic crust continuously forms at mid-oceanic ridges, moves away from these ridges by seafloor spreading, and is consumed at subduction zones. D)Earth's molten core material erupts at mid-oceanic ridges, moves away from these ridges by seafloor spreading, and is consumed at subduction zones. E)Subduction zones force oceanic crust to spread across the seafloor before being consumed at a fault valley.
In recent years in Africa, more individuals have ________ as a result of parasitic worms in waterways
A) malaria B) HIV C) dengue fever D) Lyme Disease E) schistosomiasis
variation of allele frequencies at or above the level of a species, where an allele is a specific iteration of a given gene.
What will be an ideal response?