The skin functions as a barrier to prevent the entry of microorganisms.
C. punctuated equilibrium. Scientists believe in two evolutionary theories: gradualism and punctuated equilibrium. If punctuated equilibrium suggests species can rapidly evolve into a new species, gradualism suggests that these changes (selection and variation) happen more gradually.
Answer:
Humans are gradually altering the climate and the earth's temperature through burning fossil fuels, destroying forests, and rearing animals.
Explanation:
This significantly increases the amount of greenhouse gases already present in the atmosphere, increasing the greenhouse effect and contributing to global warming.
Climate change is mostly caused by the greenhouse effect. Some gases in the Earth's atmosphere act as greenhouse glass, trapping heat from the sun and preventing it from escaping into space, causing global warming.
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The statement which geologists assume is true is that plates are denser than the oceanic crust.
A section of lithosphere which slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
Seafloor spreading is termed as the process by which molten material adds new oceanic crust to the floor of oceans. A divergent boundary is where plates move away from each other by forming rift valleys or oceanic ridges.
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