A change in the color of a substance -- this one is indeed a chemical change. Think of iron, if iron turns reddish, it's a completely different substance.
Answer: Anaerobic respiration
Explanation:
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The two type of nutrients are: micronutrients and macronutrients.
Examples of macronutrients are: carbohydrates, fats, protein.
Examples of micronutrients are: vitamins and minerals
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Net primary productivity (NPP) can be defined as the amount of energy made available by plants to animals, only at the herbivore leve. The NPP of an ecosystem depends on different factors such as the levels of heat, moisture, nutrients available, competition..If the NPP is low (little available food) than animals sparse (have to move to find it).
