Botany Ch 4

Which plant hormone is a gas?

• auxin
• gibberellin
• ethylene
• cytokinin

Which hormone promotes seed germination?

• abscisic acid
• ethylene
• gibberellin
• auxin

Negative gravitropism is exhibited in ____, because there is more auxin on _____ side of a shoot.  

• shoots, shaded
• shoots, light
• roots, shaded
• roots, light

Response to light in which plant stems bend toward a light source

• gravitropism
• phototropism
• negative gravitropism
• negative phototropism

When the plant responds to gravtiy

• Phototropism
• Thigmotropism
• Gravitropism
• Hydrotropism

Hormone related to the growth of the plant in response to tropisms

• Auxin
• Cytokinins
• Ethene
• Absisic acid

Breaks seed dormancy and promotes growth (can make fruit bigger)

• Auxin
• Gibberellin
• Cytokinins
• Ethene

Helps fruit ripen

• Auxin
• Gibberellin
• Cytokinins
• Ethylene

A plant growing in response to the sunlight. 

• Gravitropism 
• Phototropism
• Thigmotropism
• Hydrotropism

A period of a plant when is does NOT grow

• spore
• stamen
• nutrient
• dormancy