AnswersTPS EdX BiologyPractice TestQuestion 3
3
practice testMultiple Choice

Practice Test

Question 3 • TPS EdX Biology

Which statement best describes the purpose of Earth's spheres?

Answer
A
They work independently as closed systems to move nutrients to living and nonliving parts of Earth.
B
They work together as open systems to cycle matter through ecosystems.
C
They work together as open systems to move matter to living and nonliving parts of Earth.
D
They work independently as closed systems to cycle matter through ecosystems.
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