A chromosome structure is what it is made of and how it is organized. It’s function is what it does. How does knowing about the structure and function of chromosomes help to explain variation in sexually reproducing organisms?

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

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