30 Questions
What is the purpose of crown architecture?
To reduce self-shading of leaves
Leaf positioning is important for intercepting direct ______.
light
True or false: Plants are able to use all wavelengths of the electromagnetic spectrum for photosynthesis.
False
True or false: The leaf area index (LAI) is only useful for measuring primary productivity at the individual level.
False
______ is the practice of arranging leaves on a stem to minimize self-shading.
Phyllotaxy
What is phyllotaxy?
The art of leaf placement on a stem to reduce self-shading
The Leaf area index (LAI) is a measure of primary productivity at the ______ or stand level.
individual
What is the leaf area index (LAI)?
A proxy for primary productivity at the individual or stand level
True or false: Crown architecture plays a role in reducing self-shading of leaves.
False
Plants can only utilize wavelengths of ______ light for photosynthesis.
visible
What wavelengths of light do plants use for photosynthesis?
Only wavelengths in the visible light portion of the electromagnetic spectrum
True or false: Light in the understory of a forest is only available as diffuse light.
False
What types of light are present in the understory of a forest?
Direct light and sunflecks
True or false: Leaves at the top of the canopy are not subject to thermal stress.
False
Diffuse light and sunflecks are the two types of light that reach the ______ of a forest.
understory
True or false: Leaf fenestration is not an adaptation to stress.
False
What is the main stress experienced by leaves at the top of the canopy?
Thermal stress
Leaves at the top of the canopy are exposed to ______ stress.
thermal
What is leaf fenestration?
An adaptation to shade, heat, and wind stress
Leaf fenestration is an adaptation to ______, heat, and wind stress.
shade
True or false: Submerged feathery leaves experience significant drag and shearing stress.
False
True or false: Developing buds are not able to detect their external environment.
False
What is the advantage of submerged feathery leaves?
They experience very little drag and shearing stress
Submerged feathery leaves are not subject to much ______ stress.
shearing
True or false: Internal signals do not play a role in regulating plant growth and development.
False
What can developing buds detect?
Their external environment
Developing buds are able to sense their ______ environment and adjust accordingly.
external
How do plants regulate their growth and development?
In response to both internal and external signals
Plants use both internal and ______ signals to regulate their growth and development.
external
True or false: Phyllotaxy refers to the placement of flowers on a stem.
False
Study Notes
- Crown architecture is important to position leaves on a stem or canopy to intercept direct light.
- Phyllotaxy is the art of leaf placement on a stem to reduce self-shading.
- The leaf area index (LAI) is a proxy for primary productivity at the individual or stand level.
- Plants are limited to the wavelengths within the visible light portion of the electromagnetic spectrum to carry out photosynthesis.
- Light in the understory of a forest comes in as diffuse light and sunflecks.
- Leaves at the top of the canopy are subject to serious thermal stress.
- Leaf fenestration is an adaptation to shade, heat, and wind stress.
- Submerged feathery leaves experience very little drag and by extension shearing stress.
- Developing buds can detect their external environment and develop accordingly.
- Plants respond to internal and external signals to regulate their growth and development.
Test your knowledge on the intricate world of plant architecture and growth with this quiz. From the importance of crown architecture to the adaptations of leaves to different stresses, this quiz covers a range of topics related to how plants grow and develop. Brush up on keywords such as phyllotaxy and leaf area index and see how much you know about the fascinating ways in which plants respond to their environment.
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