Each cardiac cycle is initiated by spontaneous generation of an action potential in the sinus node.

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#Id: 499

#Unit 2. Cellular Organization

For most cases, more number of chromosome or greater genome content = higher evolutionary status

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#Id: 500

#Unit 2. Cellular Organization

Exceptionally Amphibians and some flowering plants have greater amount of genome hence termed as PARADOX or C-Value Paradox

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#Id: 501

#Unit 2. Cellular Organization

Disparity in genome content vs evolutionary status is called as C-Value Paradox

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#Id: 502

#Unit 2. Cellular Organization

Number of gene per genome also shows paradoxical character.

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#Id: 503

#Unit 2. Cellular Organization

If entire genome is encoding than mathematically human should have 106 genes but humans have only 30,000 to 50,000 genes this is also a paradoxical feature of genome 

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#Id: 504

#Unit 2. Cellular Organization

Drosophila melanogaster also shows C-value paradox in term of their number of genes.