tropism powerpoint - Winston-Salem/Forsyth County Schools
Week#32, 2012-13 ESSENTIAL QUESTION Homework Copy first, then respond. Today Announcements, Questions???, Review Students Objective
Quotation to relate to science or life Teacher presents. Students do. Wednesday, May 8 EQ: How can you find out how experimental (treated) tomato seeds grow? My Answer(Class work AND homework): Homework for Friday: Vocabulary. Homework for tomorrow: Proofread EQ answer. A, Q, R Obj. 6.L.1 and 6.L.2
The eye of the master will do more work than both his hands. Benjamin Franklin Review of Tropism biotic, abiotic factors Finish TROPISM guided notes Ecology/ ecosystem reading and activity 1. Tropo means what? 2. What is tropism? 3.
What are 3 types of tropism? 4. In a diagram, show what positive geotropism is. 5. In a diagram, show what negative geotropism is. 6. What is good about geotropism? (Why is
it important to a plant?) 7. What does photo mean? 8. Where have you noticed phototropism? 9. What kind of plants exhibit thigmotropism? 10.
In addition to positive geotropism, what kind of tropism do a plants roots show? 11. How do you think the capital N tree TROPISM NEXT TROPISM Plant growth in response to a stimulus .
(tropo turn) There are many types of tropisms : Phototropism Geotropism 3 main types Thigmotropism Hydrotropism Chemotropism Thermotropism *Can be positive or
negative NEXT GEOTROPISM (Geo Earth) Geotropism is the growth of a plant in response to gravity. Negative Geotropism Negative Geotropism It is the growth of a plant away from the center of the earth-opposite from the pull of gravity
Ex. stems grow up Positive Geotropism It is the growth of a plant towards the center of the earth--down with gravity. Ex. roots growing down Positive Geotropism NEXT IMPORTANCE OF GEOTROPISM Pulls roots down to anchor a plant Roots can get needed water and
minerals if they stay in the soil NEXT CORN TROPISM LAB http://www.youtube.com/watch?v=iFCdAgeMGOA&f eature=related PHOTOTROPISM (Photo light) The growth response of a plant in response to light direction is called phototropism. Ex. Stems growing toward the window to get to the light
NEXT IMPORTANCE OF PHOTOTROPIS Enables leaves to be in the best position possible to receive adequate light M for photosynthesis http://www.darienps.org/teachers/otterspoor/botany/ tropisms/Gravitropismwlight.jpg NEXT
THIGMOTROPISM (Thigmo touch) Thigmotropism is the growth of a plant in response to touch/contact. Photo by Christopher Meloche Tendrils on a sweet pea Vines growing on a wall or fence NEXT
SOME OTHER TYPES OF TROPISM NEXT THERMOTROPIS Thermotropism is M the tendency of plants or other organisms to bend toward or away from heat. (Therm heat) Ex. curling of Rhododendron leaves in response to cold temperatures.
HYDROTROPIS (hydroM water) Hydrotropism is the growth in response to water. Ex. roots growing toward moisture Chemotropis m (Chemo is chemical) movement Chemotropism caused by chemical stimuli. Ex. Growth of a pollen tube is always towards the ovules
so that reproduction can occur NEXT Geotropism happened here! The N Tree. This tree is on a trail near Salem Lake. Mr. Anderson always has to duck when he rides
underneath it. Back to our E.Q.--How can you find out how experimental (treated) tomato seeds grow? Key word : experimental Answer: By comparing to growth of the ________________ control (untreated) seeds. (You always need a control.)
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