In the earliest stages of development, all four organisms have a knobby head, gill slits, and a tail. These similarities tell us that all four of these organisms have a common ancestor.
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Answer:
semi-permeable
Explanation:
passive transport is the movement of substances along the concentration gradient and no energy is utilized in it
Answer:
1
.Start by putting on a song with a good beat.
2. Start with the side-to-side move.
3. Sway right, left, right, right.
4. Add some arms once you feel you have the style down
EXPLANATION
how to dougie
B. Bicarbonate
<em>The blood brings bicarbonate to the lungs, and then it is exhaled as carbon dioxide. The kidneys also help regulate bicarbonate... it is excreted and reabsorbed by the kidneys.</em>
<em>The body's main response is to get rid of more carbonic acid and hold on to as much bicarbonate base in the kidneys as it can.</em>
