recitation9KEY - NAME(S): Activity#9: Plant Development...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
NAME(S): BIOL120 Activity#9: Winter 2008 1. What would the effect be of a mutation that results in the expression of Glabra2 in all root epidermal cells? Explain. Would this plant be viable? Why or why not? ROOT EPIDERMAL CELLS THAT EXPRESS GLABRA2 DO NOT BECOME ROOT HAIR CELLS. IN A PLANT WHERE ALL CELLS EXPRESS GLABRA2, THERE WILL BE NO ROOT HAIR CELLS. THIS PLANT MIGHT NOT BE VIABLE BECAUSE THE ONLY REGION OF THE ROOT THAT ABSORBS WATER AND MINERAL NUTRIENTS IN THE REGION WITH ROOT HAIRS. THERE COULD, HOWEVER, BE SOME ABSORPTION THROUGH THE EPIDERMAL CELLS SO THE PLANT MIGHT JUST BE SMALLER. 2. Describe the path of a potassium ion moving from the soil in the vicinity of a plant root into the xylem through the apoplast, being sure to note where membranes are crossed, if any. THE POTASSIUM ION WOULD TRAVEL THROUGH THE CELL WALL TO THE ENDODERMIS WHERE IT WOULD, FOR THE FIRST TIME, BE TRANSPORTED BY A PROTEIN (AN ION CHANNEL) THROUGH THE PLASMA MEMBRANE AND INTO THE
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/05/2008 for the course BIOL 120 taught by Professor Laporte&shillington during the Fall '08 term at Eastern Michigan University.

Page1 / 2

recitation9KEY - NAME(S): Activity#9: Plant Development...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online