Exercise 10: The Leaf

• Leaf - organ of plant that primarily functions for photosynthesis and is the major site of transpiration
• Label the generalized parts of the leaf.

  A) Lamina

  B) Midrib

  
• Label the types of phyllotaxy.

  A) Opposite

  B) Alternate

  C) Whorled

  
• Label the following based on proximity to the node.

  A) Petriolate

  B) Sessile

  
• Label the complexity of the leaf.

  A) Simple leaf

  B) Compound leaf

  C) leaflet

  
• Trifoliate - leaves with three leaflets
• Classify the compound leaves.

  A) Pinnately

  B) Palmately

  
• Label the parts of first-order pinnately and second-order pinnately compounded leaves.

  A) Rachis

  B) Leaflet

  C) Petiolule

  D) Petiole

  E) Rachis

  F) Petiole

  G) Rachilla

  H) Leaflet

  I) Petiolule

  
• Stipules - nodal outgrowths which may resemble buds, leaves or thorns and usually occur perpendicular to the petiole's axis.
• Label the required structure.

  A) Stipules

  B) Vein

  
• Label the kinds of leaf venation.

  A) Parallel

  B) Reticulate

  
• Label the following outlines of the leaf.

  A) Linear

  B) Elliptic

  C) Lanceolate

  D) Oblanceolate

  E) Ovate

  F) Obovate

  
• Label the following margins of the leaf.

  A) Entire

  B) Undulate

  C) Crenate

  D) Serrate

  E) Dentate

  
• Label the following apex of the leaf that are checked.

  A) Acuminate

  B) Rounded

  C) Acute

  D) Emarginate

  
• In the bract of the bougainvillea, what is the modified leaf part?

  Leaf blade

  
• In the carnivorous leaves of pitcher plants, what is the modified leaf part?

  leaf blade

  
• In the meristematic leaves of kataka-taka, what is the modified leaf part?

  leaf blade

  
• In the phyllodes of citrus, acacia, or bitter wood, what is the modified leaf part?

  Petiole

  
• In the pseudostem of banana, what is the modified leaf part?

  Entire leaf

  
• In the spine of the dragonfruit or cactus, what is/are the modified leaf part/s?

  petiole/blade

  
• In the storage leaves of aloe vera or onion, what is the modified leaf part?

  entire leaf

  
• Cuticle - covering the surface of the leaf, a thick non-cellular layer composed of cutin and prevent water loss
• Bulliform cells - facilitate leaf rolling to prevent desiccation
• What are the vascular bundles or veins covered by?

  Bundle Sheath
• Label the leaf anatomy of a Zea mays x.s.

  A) Mesophyll

  B) Pavement cells

  C) bulliform cells

  D) Airspace

  E) Stoma

  F) Veins

  G) Vascular bundle

  
• What type of cells is the mesophyll composed of?

  chlorenchyma cells
• Label the pertinent structures in a santan dicot leaf x.s.

  A) Xylem

  B) Midvein

  C) Stomata

  D) airspace

  E) Spongy mesophyll

  F) Palisade mesophyll

  
• In the pinus sp. needle x.s. label the pertinent anatomical features.

  A) Resin ducts

  B) Endodermis

  C) Transfusion tissue

  D) Phloem

  E) Xylem

  F) lobed mesophyll

  G) hypodermis

  H) Epidermis

  I) Stomate

  
• Palisade mesophyll - uni or multiseriate tissue comprised of elongated cells perpendicular to the plane of the leaf.
• Spongy mesophyll - made of loosely arranged round or irregularly shaped cells with prominent air spaces in between
• Label the following bases of the leaves that are checked

  A) Cuneate

  B) Attenuate

  C) Rounded

  D) Cordate