Answer:
it represents the mating between males and females is shown by a horizontal line between their respective symbols.
Explanation:
No, polar bears does not migrate.
Answer:
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Explanation:
<span>An environmental factor that causes a population to decrease is death</span>
Answer:
Net Primary productivity
Explanation:
In an ecosystem, primary productivity is a term used for autotrophic organisms. It is the process by which these organisms like plants, green algae etc. make their own food using inorganic sources. However, they do not utilize all the matter they make from this process.
The NET PRIMARY PRODUCTIVITY (NPP) is the amount of organic material that is available for transfer to the next trophic level after subtracting material used for respiration. This means that NPP is the amount available after removal of the one to be lost via respiration i.e. NPP = GPP - respiration.