Multiple Choice
Which of the following is true of an infant's brain at birth?
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1. Introduction to Biology
Introduction to Biology
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Which of the following best describes the role of the Sun in Earth's biosphere?
A
It is the primary source of energy for most life on Earth.
B
It provides the majority of Earth's oxygen through direct emission.
C
It is responsible for the formation of Earth's core.
D
It is the main source of nitrogen in the atmosphere.
Verified step by step guidance1
Understand the role of the Sun in Earth's biosphere: The Sun is the primary source of energy for most life on Earth, driving processes like photosynthesis and influencing climate and weather patterns.
Eliminate incorrect options: The Sun does not directly emit oxygen; oxygen is primarily produced by photosynthetic organisms such as plants and algae.
Consider Earth's core formation: The Sun is not responsible for the formation of Earth's core, as the core formed during Earth's early development due to gravitational forces and planetary differentiation.
Evaluate nitrogen in the atmosphere: The Sun is not the main source of nitrogen in the atmosphere; nitrogen primarily originates from Earth's geological and biological processes.
Conclude that the correct answer is: The Sun is the primary source of energy for most life on Earth, as it provides the energy necessary for photosynthesis and supports the food chain.
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