The exchange takes place in the millions of alveoli in the lungs and the capillaries the envelop them. Inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
<span>Decomposers are organisms such as ants, earthworms, bacteria an fungi that break down organic matter like dead and decaying plants and animals. Decomposers break the material down into its mineral components and returns it to the soil. If decomposers are absent in this ecosystem there would be no recycling of nutrients. Forest plants would not have available minerals to grow and productivity levels would fall significantly. </span>
A) The DNA base sequence changes permanently.
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I think option (d) is right answer
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I can't see this it's blore