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babunello [35]
3 years ago
5

Why are hydrocarbons not soluble in water

Biology
1 answer:
bearhunter [10]3 years ago
4 0
They exhibit considerable molecular complexity and diversity
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The American Black Bear lives in many parts of North America. A black bear in Colorado might hibernate for three or more months
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C. Florida black bears have less territory and cannot risk a long hibernation.
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-Present-day mitochondria and chloroplasts probably evolved as a consequence of early endosymbiosis: the ancestor of the eukaryo
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The evidence suggests that these chloroplast organelles were also once free-living bacteria.

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The endosymbiotic event that generated mitochondria must have happened early in the history of eukaryotes, because all eukaryotes have them.

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3 years ago
Cross bridge formation between myosin heads and actin molecules is caused by the elevation of calcium ion concentration in the c
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sarcoplasmic reticulum deteriorates and ATP production is stopped

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Rigor mortis is the third stage of death characterized by stiffening of joints and muscles in body. The stiffening occurs because muscles are not able to return to the relaxed state. There are two reasons for rigor mortis, depletion of ATP and increase in calcium concentration in cytosol. Due to these factors the actin-myosin crossbridge is not able to break and the muscles remain in contracted state.

Sarcoplasmic reticulum deteriorates and calcium is released into the cytosol. Sarcolemma ( covering of muscle fiber ) also breaks down releasing extra calcium into the cytosol. Calcium is responsible for formation of actin-myosin cross bridge and when its concentration increases the bridge is formed continuously leading to stiffening of muscles and joints.  

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Which term refers to cells having different jobs in an organism ?
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<span>The answer would be Cell specialization</span>
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