6.2.1 Leaf Structure

• 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