The answer is 2- circulatory and excretory
Answer: Option E.
glycosaminoglycans
Explanation:
Proteoglycans are core proteins that are attached to glycosaminoglycans chains via covalent bond because
glycosaminoglycans consist of repeating disaccharide units composed of an N-acetylated or N-sulfated hexosamine and either a uronic acid or galactose . They are found in connective tissues and cell matrix of animal cells.
1. the hearts job is to propel blood throughout the body
2. i think the lungs trade CO2 for O2
3. they would go into hypothermic shock or something:p
Explanation:
<h2>convection</h2><h2>It moves through convection, because heat is transferred through density differences. When Peter touches a warm radiator, heat is transferred to his body by convection </h2><h2>
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