Leaf Adaptations - Topic 1 (Plant Science II), Element 1 Flashcards
What are some adaptations of leaves?
- hairy
- waxy
- coloured
- rolled
- variegated
- reduced
- succulent
- oils
- aerenchyma cells
- bulbs
These adaptations help leaves perform multiple functions for plants.
What are the advantages of leaf adaptations for plants?
- reduced transpiration
- increased humidity
- reflection of light
- cooling of leaf
- storage of water
- protection from herbivory
- buoyancy in aquatics
These advantages enhance plant survival and efficiency.
What is the primary function of leaves?
Photosynthesis
This is the main process through which leaves convert light energy into chemical energy.
What structure allows leaves to track the sun?
Pulvinus
This joint-like structure at the base of the petiole enables movement for optimal light capture.
How do pulvini assist leaves on hot days?
They angle leaves to reduce direct sunlight exposure
This adaptation helps prevent overheating of the leaf.
What are shade-tolerant plants adapted to?
Low light levels
These plants possess more chlorophyll per cell, resulting in darker green leaves.
What is the characteristic of leaves in habitats with high rainfall?
They often have grooves that form drip-tips
This adaptation allows excess water to run off quickly.
What is totipotency in plant cells?
The ability of plant cells to differentiate into another type of cell
This allows for propagation from various plant parts.
What type of veins are common in Monocots?
Parallel veins
This vein structure is a distinguishing feature of monocotyledons.
What type of veins are common in Eudicots?
Networks of veins
This structure is characteristic of eudicotyledons.
What is a drip-tip in leaves?
A pointed tip that allows water to run off easily
This feature is particularly useful in high rainfall environments.
Fill in the blank: Leaves also cool plants through ______________.
transpiration
This process helps regulate temperature in plants.
*
What is the difference between simple and compound leaves?
Simple leaves consist of a single blade, while compound leaves have multiple leaflets
This classification affects leaf function and morphology.
Na
True or False: Shade-intolerant plants have more chlorophyll per cell than shade-tolerant plants.
False
Shade-tolerant plants are adapted to low light and have more chlorophyll.
What are the benefits of reduced leaf size?
To reduce water loss
This adaptation is crucial in arid environments.
What type of leaves do plants in tropical rainforests typically have?
Grooved leaves with drip-tips
These adaptations help manage excess water.
What are some examples of leaf adaptations?
- hairy
- waxy
- coloured
- rolled
- variegated
- reduced
- succulent
- oils
- aerenchyma cells
- bulbs
These adaptations provide various advantages to plants.
What is the advantage of reduced transpiration in leaf adaptations?
Helps conserve water
Reduced transpiration is especially beneficial in arid environments.
True or False: Large leaves are typically found in plants from dry habitats.
False
Large leaves are often found in habitats where water is readily available.
What is the general term for hair-like structures on leaves?
Trichomes
Trichomes can vary in type, including lanate, pilose, hirsute, and tomentose.
What are some advantages of leaf hairs?
- Insulate from heat
- Increase humidity of air around leaves
- Catch water from the air
- Reflect away sunlight
- Channel water
- Insulate against cold
These adaptations help plants survive in various environmental conditions.
What is the purpose of a waxy surface on leaves?
Reduces water loss through evaporation
Waxy surfaces are common in plants from arid environments.
