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Topic 6: Plant Structures and Their Functions
6.2 Plant Adaptations
6.2.1 Leaf Structure
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Cards (53)
What type of gas exchange occurs in the spongy mesophyll of a leaf?
CO2 and O2
What do vascular bundles transport throughout the plant?
Water, nutrients, and photosynthates
Chloroplasts are abundant in the spongy mesophyll of a leaf.
False
Gas exchange in leaves occurs through the
stomata
Transpiration is regulated by guard cells, which control the opening and closing of
stomata
The lamina of a leaf is designed to capture sunlight for
photosynthesis
The lamina's large surface area maximizes light
absorption
What does the spongy mesophyll allow in a leaf?
Gas exchange
Stomata are small pores on the leaf surface that regulate gas exchange and water loss.
True
The opening and closing of stomata balances gas exchange and water conservation.
True
The spongy mesophyll contains chloroplasts for photosynthesis.
False
Stomata regulate gas exchange and water
loss
Order the main parts of the external anatomy of a leaf.
1️⃣ Lamina
2️⃣ Petiole
3️⃣ Veins
Match the leaf part with its function:
Lamina ↔️ Captures sunlight
Petiole ↔️ Supports leaf, connects to stem
Veins ↔️ Transports water and nutrients
The spongy mesophyll allows for gas exchange and photosynthesis.
True
Xylem transports water and minerals using dead cells with thick
walls
Trichomes are hair-like outgrowths on the leaf surface that can reduce water loss and deter herbivores.
True
What process is the leaf structure adapted to maximize?
Photosynthesis
Stomata
regulate both gas exchange and water loss in leaves.
True
The petiole connects the leaf to the
stem
What controls the opening and closing of stomata?
Guard cells
What is the function of the lamina in the external anatomy of a leaf?
Captures sunlight
Match the leaf part with its primary function:
Palisade Mesophyll ↔️ Photosynthesis
Spongy Mesophyll ↔️ Gas exchange
Stomata ↔️ Transpiration
Vascular Bundles ↔️ Transport of water
The petiole connects the leaf to the stem and supports the
lamina
.
True
What is the function of the epidermis in a leaf?
Protective outer layer
Vascular bundles transport the products of photosynthesis throughout the
leaf
Stomata allow the uptake of carbon dioxide and the release of
oxygen
Match the leaf part with its function in photosynthesis:
Epidermis ↔️ Protective outer layer
Palisade Mesophyll ↔️ Photosynthesis
Spongy Mesophyll ↔️ Gas exchange
Stomata ↔️ Water loss regulation
What is the function of the epidermis in a leaf?
Provides a protective outer layer
The leaf structure includes large surface area, thin layers, and abundant chloroplasts to maximize
photosynthesis
.
True
The lamina is the broad, flat surface of the leaf designed to capture
sunlight
What are the key components of the epidermis in the internal anatomy of a leaf?
Cuticle, guard cells
What does the vascular bundle in a leaf transport?
Water and nutrients
What does phloem transport in leaves?
Sugars and organic compounds
What is the function of hydathodes in leaves?
Excretion of excess water
The palisade mesophyll contains chloroplasts for
photosynthesis
Match the leaf part with its function in photosynthesis:
Palisade Mesophyll ↔️ Photosynthesis
Stomata ↔️ Gas exchange and water loss regulation
Vascular Bundles ↔️ Transport water, nutrients, and photosynthates
What is the primary function of the lamina in a leaf?
Captures sunlight
Arrange the following leaf parts and their primary functions in the correct order:
1️⃣ Palisade Mesophyll - Photosynthesis
2️⃣ Spongy Mesophyll - Gas exchange
3️⃣ Stomata - Gas exchange and transpiration
4️⃣ Vascular Bundles - Transport water and nutrients
What is transpiration in plants?
Water loss through evaporation
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