Van Valen law- he found a surprising result: rather straight curves, implying that the probability of extinction is roughly constant.

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#Id: 5550

#Unit 7. System Physiology – Animal

The second half of the distal tubule and the subsequent cortical collecting tubule have two distinct cell types:  principal cells and intercalated cells

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#Id: 8983

#Unit 11. Evolution and Behavior

Which is a group of interbreeding, sexually reproducing individuals that have a common set of genes—the gene pool. 

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#Id: 1266

#Unit 7. System Physiology – Animal

Zona glomerulosa cells capable of secreting significant amounts of aldosterone because they contain the enzyme aldosterone synthase.

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#Id: 10314

#Unit 4. Cell Communication and Cell Signaling

Tumors that arise from exposure to mutagens, such as melanomas (UV light) and lung carcinomas (tobacco smoke) the number of mutations may be hundredfold greater than this. These altered proteins are known as neo-antigens

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#Id: 3240

#Unit 3. Fundamental Processes

Mutations that alter a single nucleotide are called point mutations.