Answer:
B. a substance that can donate an H+ ion
Explanation:
Answer:
They are single celled organisms.
Explanation:
<u>Answer:</u>
The Answer is <em><u>Option D. </u></em>
<em>Exchange of respiratory gases, oxygen and carbon dioxide take place in the alveoli of the lungs. Oxygen which is inhaled from the atmosphere diffuses through the walls of the alveoli and reaches to the adjacent capillaries into the red blood cells.</em>
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The answer is the fourth choice
They will compete with other shellfish and clams and hurt their populations.