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What is the primary function of melanin in humans?
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1. Introduction to Biology
Introduction to Biology
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Humans are primarily considered a part of which of Earth's spheres?
A
Lithosphere
B
Atmosphere
C
Hydrosphere
D
Biosphere
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Step 1: Begin by understanding the concept of Earth's spheres. Earth's spheres are large systems that interact with each other, including the lithosphere (land), atmosphere (air), hydrosphere (water), and biosphere (life).
Step 2: Recognize that humans are living organisms, which means they are part of the sphere that encompasses all living things on Earth.
Step 3: Recall that the biosphere includes all ecosystems and living organisms, such as plants, animals, and humans, as well as their interactions with the other spheres.
Step 4: Eliminate the other options by considering their definitions: the lithosphere refers to Earth's solid outer layer, the atmosphere refers to the layer of gases surrounding Earth, and the hydrosphere refers to all water on Earth. None of these directly represent living organisms.
Step 5: Conclude that humans, as living beings, are part of the biosphere, which is the sphere dedicated to life on Earth.
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