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What are the cell builders of the body? What is the system that releases energy, and requires oxygen?

Answer 1

Nucleus, Ribosome, ER, Golgi
Mitochondria

Since the term "builders" is a little ambiguous, I'll just list each one's function: the nucleus provides instructions (RNA and DNA); the ribosome assembles proteins that constitute vital bodily components; the ER (endoplasmic reticulum) produces proteins and fat; the golgi apparatus assembles proteins, fat, and other materials, as well as some hormones.

"The Mitochondria is the powerhouse of the cell!"

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Answer 2

Josiah Austin

The cell builders of the body are proteins. The system that releases energy and requires oxygen is the respiratory system.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.