Bicoid act as the anterior morphogen.

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#Id: 2214

#Unit 11. Evolution and Behavior

Populational change is Darwin’s hypothesis that evolution occurs by changes in the proportions (frequencies) of different variant kinds of individuals within a population.

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#Id: 6350

#Unit 8. Inheritance Biology

Barr body- Inactivated X chromosome that appears as a condensed, darkly staining structure in most cells of female placental mammals. 

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#Id: 6510

#Unit 7. System Physiology – Animal

Tyrosine is transported into catecholamine-secreting neurons via a Na+ - dependent carrier

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#Id: 2393

#Unit 3. Fundamental Processes

The SL RNA provides an exon that is connected to the first exon of an mRNA by trans-splicing. The reaction involves the same interactions as nuclear cis splicing but generates a Y-shaped RNA instead of a lariat.

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#Id: 1769

#Unit 4. Cell Communication and Cell Signaling

Absence of adjuvants

a. Low levels of costimulation

b. Presentation of antigen by immature