Zeff=Z –S

Chlorine would have a Z value of 17 (the atomic number of Chlorine). Continuing to use Chlorine as an example, the 10 inner electrons (S) would screen out the positive charge of ten protons. Therefore there would be and effective nuclear charge of 17-10 or +7.

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#Id: 10463

#Unit 4. Cell Communication and Cell Signaling

MYC-MAX dimers regulate genes that control proliferation, such as cyclins.

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#Id: 8952

#Unit 11. Evolution and Behavior

One is unequal crossing over, in which recombination happens between different positions on chromosomes that are misaligned during meiosis. 

Another is replication slippage, in which the DNA polymerase loses its place and copies a segment of chromosome twice.

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#Id: 5755

#Unit 10. Ecological Principles

Indicator species - Some species demonstrate health of community 

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#Id: 3154

#Unit 7. System Physiology – Animal

Vital capacity = Inspiratory reserve volume + tidal volume + expiratory reserve volume

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#Id: 4484

#Unit 13. Methods in Biology

The electrocardiogram (ECG or EKG) is a measures the electrical activity of the heart.