Helianthus Root Cross Section Labeled Quiz

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Questions and Answers

Match the following wood structures with their descriptions:

Resin ducts or resin canals = Cells that secrete resin Tracheids = Comparison between spring and summer tracheids Rays = Visible in longitudinal section

Match the following twig structures with their roles:

Terminal bud = Primary bud at the end of a twig Axillary bud = Bud located in the axil of a leaf Leaf scar = Scar left after a leaf falls off

Match the following tree sections with their cell types:

Bark = Outer protective covering of a tree Wood = Main structural tissue of a tree Heart wood = Inner, older layers of wood in a tree Sap wood = Newer, outer layers of wood in a tree

Match the following wood types with their characteristics:

Hard wood = Dense and durable type of wood Soft wood = Less dense and typically used for construction Signup and view all the answers

Match the following terms with their meanings in tree anatomy:

Bundle scar = Scar left when vascular bundles detach from stem Nodes = Points on a stem where leaves, buds, or branches originate Internodes = Segments between two nodes Lenticels = Small pores on bark for gas exchange Signup and view all the answers

Match the stem section with the correct plant type:

Corn (Zea mays) stem = Monocot Sunflower (Helianthus) stem = Dicot Bass (Tilia) stem = Dicot Oak (Quercus) wood = Dicot Signup and view all the answers

Match the stem section with the correct structure present:

Corn (Zea mays) stem = Closed collateral vascular bundle: phloem and xylem without vascular cambium Sunflower (Helianthus) stem = Open collateral vascular bundle: fibers, phloem, vascular cambium, xylem Bass (Tilia) stem = Vascular cambium Oak (Quercus) wood = Tracheids Signup and view all the answers

Match the stem section with the correct feature related to support:

Corn (Zea mays) stem = Sclerenchyma fibers forming a supportive layer Sunflower (Helianthus) stem = Collenchyma forming a supportive layer – Why not sclerenchyma? Bass (Tilia) stem = Phloem fibers (mostly secondary) Oak (Quercus) wood = Fibers Signup and view all the answers

Match the stem section with the correct absence characteristic:

Corn (Zea mays) stem = Confluence of parenchyma; no cortex and pith Sunflower (Helianthus) stem = Pith made of parenchyma cells Bass (Tilia) stem = Pith - Absent in sections of old woody stems Oak (Quercus) wood = Rays (Seen in longitudinal section) Signup and view all the answers

Match the structure with the correct stem section it is found in:

Epidermis = Found in Corn (Zea mays) stem Cortex (Cortical region) = Found in Sunflower (Helianthus) stem Phloem rays = Found in Bass (Tilia) stem Vessels = Found in Oak (Quercus) wood Signup and view all the answers

Match the woody dicot stem section with the correct term for cork formation:

Cork = Phellem = Bass (Tilia) stem Cork cambium = Phellogen = Bass (Tilia) stem Secondary cortex = Phelloderm = Bass (Tilia) stem Periderm = Phellem + Phellogen + Phelloderm = Bass (Tilia) stem Signup and view all the answers

Study Notes

Wood Structures and Descriptions

Twig structures have specific roles in tree anatomy
Tree sections are composed of different cell types
Wood types are characterized by distinct features
Terms in tree anatomy have specific meanings

Stem Sections and Characteristics

Stem sections are associated with specific plant types
Stem sections have specific structures present
Stem sections have features related to support
Stem sections are characterized by specific absences

Stem Sections and Woody Dicot Characteristics

Woody dicot stem sections have a specific term for cork formation

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Description

Test your knowledge of plant anatomy by labeling the different structures in cross-sections of a corn (Zea mays) stem and a sunflower (Helianthus) stem. Identify key components such as epidermis, sclerenchyma fibers, vascular bundles, and parenchyma.