Answer:
Mitochondria are thought to have evolved from free-living bacteria that developed into a symbiotic relationship with a prokaryotic cell, providing it energy in return for a safe place to live.
Explanation:
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The Sun is the primary source of energy for Earth's climate system is the first of seven Essential Principles of Climate Sciences.
Principle 1 sets the stage for understanding Earth's climate system and energy balances.
The Sun warms the planet, drives the hydrologic cycle, and makes life on Earth possible.
