The oxygen molecules moves through the nostrils, pharynx, trachea, bronchus, smaller and smaller branches of the bronchial tree, and then into the alveolus.
<span>The job of these envelope extensions is to increase the bacteria's surface area so they can absorb more nutrients and grow. This is especially important in an adverse environment that lacks a lot of resources.</span>
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The protonema is the part of the plant that gives rise to the gametophytes in the bryophyte plants.
</span>It gives rise to gametophyte.<span>
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I think the answer will be setting
