Answer:
Animal cells can only use nitrogen when it's combined with other elements.
Explanation:
Brainliest?
A true experiment involves the <span>Manipulation of the independent variable
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<span>Factors that affect 'neurotransmission' are plentiful, but the most common include genetics, eating habits, exposure to chemicals, and in the case of humans, stress.</span><span>
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Answer:
Observations at different distances show galaxies of different ages and therefore different stages of evolution. Observations of those different galaxies helps us to learn abt galaxy evolution because observations of distant objects reveal them as they were in the past.
Explanation:
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