h web viewfound when it was in the sunny side it did not affect bending. ... the process by which...
TRANSCRIPT
![Page 1: h Web viewFound when it was in the sunny side it did not affect bending. ... The process by which water leaves the plant. Water enters the plant by the root and root_____cells](https://reader036.vdocuments.mx/reader036/viewer/2022070606/5a700b997f8b9ac0538b9a28/html5/thumbnails/1.jpg)
Name:Phototropism and Gravitropism Fill in the Blank Notes
Main Understandings○ Explain phototropism and gravitropism as examples of control systems in plants○ Explain how our understanding of phototropism and gravitropism has changed over time.
How do plants respond to different stimuli?
● ______________________: a growth in
response to a stimuli
● Positive tropism: the plant grows
________________________ the stimuli
● ____________________________ tropism:
the plant grows AWAY from the stimuli
What is phototropism?
● When light is the _______________________that the plant responds to
● The plant has a hormone called _____________________. This hormone is found in both the roots and the top of the plant
(the shoot) and causes plant growth.
● A high concentration of auxin results in the elongation/ growth of that part of the ____________________!
How does it work? Auxin
● The auxin molecules moves ________________ from the light and result in cell elongation wherever they move.
● Light overhead: auxin moves _______________the stem causing the stem to grow
● Light to the side: the auxin moves away from the light causing that side to grow and the plant to bend ____________________ the light.
![Page 2: h Web viewFound when it was in the sunny side it did not affect bending. ... The process by which water leaves the plant. Water enters the plant by the root and root_____cells](https://reader036.vdocuments.mx/reader036/viewer/2022070606/5a700b997f8b9ac0538b9a28/html5/thumbnails/2.jpg)
Darwin’s famous experiment
● Cut off the tip it did ______________grow
● Covering the tip, it did not bend.
● Covering the base it ________________.
● Another scientist _____________________________
studies plants after Darwin.
●
● Inserted a disk on each side of the plant. Found when it was on the shady side - phototropism was affected.
● Found when it was in the sunny side it did not affect bending.
Gravitropism
● Roots also have auxins that move based on the root’s position
● Root _________________ - the auxin moves down and the BOTTOM SIDE GROWS LESS (this is opposite of auxin in the
shoot).
● Therefore, the top side grows more and it bends _____________________.
![Page 3: h Web viewFound when it was in the sunny side it did not affect bending. ... The process by which water leaves the plant. Water enters the plant by the root and root_____cells](https://reader036.vdocuments.mx/reader036/viewer/2022070606/5a700b997f8b9ac0538b9a28/html5/thumbnails/3.jpg)
Fill in the blank notes Turgor Pressure and RootsMain Understandings:
○ Explain osmosis; diffusion, active transport and root pressure in root hairs○ Explain transpiration in plants, cohesion and adhesion as properties of water, and turgor pressure
Recall:
● Where are sugars produced in our plant?____________________ By what process?___________________
● Transported by what?_______________
● Where does water leave our plant?_______________________
But where does water first enter our plant?!
● The _______________!
● The roots have tiny little extensions called
_______________ that help absorb water and minerals!
● Water moves into our roots via _______________
● The minerals have to be moved into the root cells against
their concentration gradient by ______________________.
Water Then…Moves up towards the leaves through the ________________!
What was the movement of water out of the leaves called again?______________________
Why else is water important → Turgor Pressure
![Page 4: h Web viewFound when it was in the sunny side it did not affect bending. ... The process by which water leaves the plant. Water enters the plant by the root and root_____cells](https://reader036.vdocuments.mx/reader036/viewer/2022070606/5a700b997f8b9ac0538b9a28/html5/thumbnails/4.jpg)
● Water is why are stems are either firm and straight
up or wilted!
● Turgor pressure is when water moves into our plant
cell pushing the cell ___________ against the cell
____________.
● As a result, the plant is firm or ____________.
● When water moves out of our plant cell, the cell shrinks and ________!
● Water would move into the cell in a _____________ solution
● Water would move out of the cell in a ____________ solution
Turgor Pressure also affects Guard Cells:
● When the guard cells are turgid, they _____________which allows gas exchange
● When the guard cells are flaccid or wilted, they ____________ and reduce the amount of water loss and gas exchange.
Transpiration Summary:
● The process by which water leaves the plant.
○ Water enters the plant by the root and root___________cells
○ Then moves up the________________
○ When it reaches the _________________ it turns to water vapour and leaves the plant.
○ The water leaving the plant pulls on the other water molecules by ___________________
○ The adhesion of water to the xylem cells helps prevent water from going back down.
Gas Exchange in plants:
![Page 5: h Web viewFound when it was in the sunny side it did not affect bending. ... The process by which water leaves the plant. Water enters the plant by the root and root_____cells](https://reader036.vdocuments.mx/reader036/viewer/2022070606/5a700b997f8b9ac0538b9a28/html5/thumbnails/5.jpg)
● In sunlight: ___________________
○ Carbon dioxide flows _____________the plant through the stomata to make sugars. Oxygen leaves through the_________________.
● When it is dark: Plants use ________________
○ They use the sugar they made and _____________ to produce energy. They then release __________________.
○Woody Trees/Stems have another way:
● Woody trees and stems also have tissues with pores called ___________________!
● Allows for even more gas exchange to occur.