They breathe through their skin. Air dissolves on the mucus of their skin, so they MUST stay moist to breathe.
If worms dry out, they suffocate. As fresh air is taken in through the skin, oxygen is drawn into the worm's circulatory system, and the worm's hearts pump the oxygenated blood to the head area.
Answer:
Sustainable Crop Intensification
Explanation:
I don't know why this is the answer, but it is the correct one on edge, so... Quit deleting my comments, Brainly.
Answer:
The cytoplasm
Explanation:
Prokaryotic cells do not have nucleui so their DNA floats around in the cytoplasm.
Answer:
Ionic compounds
Explanation:
Ionic crystals are hard and brittle and have high melting points.
<span>B. converted from nucleic acids to amino acids in the nucleolus.
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