$16.07 AP Bio “If I were an enzyme, I would be DNA helicase so I could unzip your genes” “If I were an enzyme, I would be DNA helicase… it’s an AP Bio thing… you wouldn’t understand!”

How do plants respond to seasons? AP Bio How do plants respond to seasons?

 PHOTOPERIODOCITY 

 PHOTOPERIODOCITY 

Some plants have Cytochrome protein Protein that detects seasonal changes in night length This signals for flowers!

Cytochrome protein Pigment molecule (absorbs light) enzyme that transfers phosphate groups

this protein undergoes a shape change when red light is present or far-red light is present

Short day plants = (LONG NIGHT PLANTS) some flowers bloom in response to the short days/longer nights of fall, or winter

Short day plants = (LONG NIGHT PLANTS) (hint: look at the amount of DARKNESS) (hint: read this from the bottom --> up) The length of NIGHT was interrupted in the scenario on the right

Long day plants = (SHORT NIGHT PLANTS) This means some flowers bloom in response to the: long days/shorter nights of spring or summer.

Long day plants = (SHORT NIGHT PLANTS) (hint: look at the amount of DARKNESS) (hint: read this from the bottom --> up) The length of NIGHT was interrupted in the scenario on the right

short day plants = (LONG NIGHT PLANTS) (hint: look at the amount of DARKNESS) (hint: read this from the bottom --> up) (hint: it is the RED shown last that matters)

long day plants = SHORT NIGHT PLANTS (hint: look at the amount of DARKNESS) (hint: read this from the bottom --> up) (hint: it is the RED shown last that matters)

put it all together (hint: look at the amount of DARKNESS) (hint: read this from the bottom --> up) (hint: it is the RED shown last that matters)