Which of the following phenomenon is not applicable for biological species concept?

a.Allopatric population

b.Sexually reproducing species

c. Hybrid species

d. Fossils

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#Question id: 2561

#Unit 2. Cellular Organization

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle is most likely defective in this condition?

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#Question id: 19459

#Unit 13. Methods in Biology

Phase-contrast microscopy depends on the refractive index of the region of specimen and generates image in which we see a pattern of 

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#Question id: 1500

#Unit 4. Cell Communication and Cell Signaling

Which of the following is not a normal function of p53?

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#Question id: 16967

#Unit 11. Evolution and Behavior

Homoplasy,

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#Question id: 2787

#Unit 2. Cellular Organization

All the following statements are true about a nucleosome except: