When plants recognize elicitors from insect saliva, An increase in the cytosolic Ca2+ concentration ([Ca2+]cyt) is an early signal that mediates insect elicitor–induced responses.

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#Id: 5816

#Unit 7. System Physiology – Animal

Negative feedback  is exerted by cortisol in the hypothalamic- pituitary axis.

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#Id: 4601

#Unit 13. Methods in Biology

If cells that have incorporated a high level of BrdU are exposed to light, they will photolyse; this has been used to selectively kill newly dividing cells.

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#Id: 6277

#Unit 8. Inheritance Biology

Polymeric Gene interaction (9:6:1) The combination of two dominant alleles that intensifies the phenotype or creates a median variation. 

Long                                          circular

                        A                                                                     

                                                                                           Disc shape

                       

Long                                                    circular

                         B  

 

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#Id: 1840

#Unit 11. Evolution and Behavior

Quaternary- Extinctions of large mammals, and birds; evolution of Homo sapiens, spread out of Africa

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#Id: 2454

#Unit 3. Fundamental Processes

Negative control of the lac operon. 

No lactose; repression. The lacI gene produces repressor, which binds to the operator and blocks RNA polymerase from transcribing the lac genes.