Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
|
Describe the direction thag shoots grow in, relating to the things that the are sensitive to. |
Shoots are sensitive to light, they grow towards light |
|
|
Desribe the directioon that roots grow in , relating to the things that they are sensitive to. |
Roots are sensitive to gravity they grow twards the force of gravity |
|
|
What is the name of the hormone in plants? |
Auxin |
|
|
What is phototropism? |
Plant growth response to light |
|
|
Describe how auxin controls Phototropism |
causes cell elongation in the shoot |
|
|
what is geotropism? |
PLant growth respons to gravity |
|
|
Describe how auxin controls geotropism |
stops cell elongation in the root |
|
|
What do negative and positve tropisms mean? |
Positive Tropism- towards the stimulus. Negative Tropism- away from the stimulus |
|
|
How can plant growth hormones be used in agriculture? |
Selective Weed Killers- Auxin maked brad leaved plants grow out of conrtol and die. Rooting powder- Auxin makes cuttings develop roots quickly. Seedless Fruit- Flowers sprayed with hormones to makes fruit develop but not seeds. Fruit Ripening- Farmers use hormones to control fruit ripening. |
