Download Plant Hormones and Responses

Name _________________________________________
Date _________________
Class _________________
Plant Hormones and Responses
In your textbook, read about plant hormones.
Complete the table by checking the correct column(s) for each description. (Use pg 648-650 )
Description
Auxin
Gibberellin
Ethylene
Cytokinin
1. Inhibits the dropping of fruit
2. Affects the ripening of fruit
3. Affects seed growth
4. Influenced by the presence of auxin
5. Stimulates the elongation of cells
6. Is the only known gaseous hormone
7. Creates apical dominance
8. Stimulates cell division
In your textbook, read about plant responses.
Write the term or phrase that best completes each statement. Use these choices:
gravitropism
nastic response
negative tropism
phototropism
positive tropism
solar tracking
thigmotropism
tropism
9. A ________________________ is a plant movement that is independent of the direction of the
stimulus and is not a growth response.
10. Plant growth toward a stimulus is called ________________________ .
11. A vine can twist around a fence as it grows because of a ________________________ .
12. A ________________________ is a growth response to light caused by an unequal distribution
of auxin.
13. Plants exhibit a ________________________ when they grow away from a stimulus.
14. A ________________________ is a plant’s growth response to an external stimulus.
15. ________________________ is the motion of a sunflower in relation to the changing position
of the Sun.
16. When roots grow down into the soil, they are exhibiting a positive ________________________ .