Root Apical meristem

root  apical  meristem is a  thimble-like  root  cap,  which  protects  the  delicate  apical  meristem  as  the root  pushes  through  the  abrasive  soil

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#Id: 8150

#XL - Q Biochemistry

Sar1 is the only GTPase switch protein activated at the ER membrane

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#Id: 8846

#XL - R Botany

In budding yeast CKI p27 = Sic1 in metazoans

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#Id: 7037

#XL - T Zoology

Darwin’s evolutionary theory - Evolution as such is the simple proposition that the characteristics of organisms change over time. 

Geometric increase 

Limited food & Space

Struggle for existence 

Variation 

Natural selection

Inheritance of useful characters

Speciation 

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#Id: 4315

#XL - T Zoology

The Forces of Evolution: 

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#Id: 9347

#XL - T Zoology

During cell migration, a tensile force is generated which physically distorts the prodomain and frees the active TGF-β dimer, initiating TGF-β signaling.