When they sleep the want to reduce the high number of risk in the chronic
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.
James Watson is credited with the discovery is the stricture of DNA.
he gibe the 3D structure of DNA in 1962 ,
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Answer:
multicellular; single celled organisms are often too tiny to be seen without a microscope
2. Process to test hypotheses
