25 Questions
What is the term for the general growth form of a plant?
Plant habit
What type of tissue is absent in herbaceous plants?
Woody tissue
Which of the following plants is an example of a herbaceous plant?
Bean
What is a characteristic of herbaceous plants?
They die back to the ground at the end of the growing season
Why are most flowering plants classified as herbaceous?
Because they lack woody tissue
What do pectins primarily help with in the primary cell wall?
Hydration
What type of connection does pectin seem to have a stronger link with?
Cellulose
What is the primary function of pectins in plant cell walls?
To regulate water content
What is a characteristic of pectins in the primary cell wall?
They help with water retention
What is the relationship between pectins and cellulose like?
Closely linked
What is the appearance of opposite clusters due to over crowding?
Whorl or verticel
What is the arrangement of verticels?
Racemose
What is the reason for the appearance of opposite clusters as whorl or verticel?
Due to over crowding
What is the characteristic of the arrangement of opposite clusters?
Overcrowded
What is the term for the arrangement of verticels in a specific pattern?
Racemose arrangement
What is the purpose of cutine and other waxy polymers?
To protect the epidermal cells
Where are cutine and other waxy polymers deposited?
On the free surface of the epidermal cells
What is the name of the structure formed by cutine and other waxy polymers?
Cuticle
What is the composition of the cuticle?
Waxy polymers and lipids
What is the location of the epidermal cells?
On the outer surface of the skin
Where do leaf primordia arise?
Eumeristem
What is the region where cortical ground tissue arises?
Eumeristem
What is the term used to describe the region where leaf primordia and the procambium arise?
Eumeristem
Which of the following structures arises from the eumeristem?
Leaf primordia
What is the eumeristem associated with?
Primary growth
Study Notes
Plant Habit
- Plant habit refers to the general growth form of a plant
- Herbaceous (herb) plants have no woody tissue
- Examples of herbaceous plants include beans and irises
Leaf Arrangement
- Opposite clusters of leaves can give the appearance of a whorl or verticel due to overcrowding
- Verticels are arranged in a racemose manner
Epidermal Cells
- Cutine and other waxy polymers are deposited on the free surface of epidermal cells, forming a structure called cuticle
Cell Wall Composition
- Pectins have more links with cellulose than hemicellulose with cellulose
- Pectins help to hydrate the primary cell wall
Tissue Development
- Leaf primordia arise from the eumeristem
- Procambium and cortical ground tissue also arise from this region
Test your knowledge of plant morphology, including plant habit, leaf arrangement, and epidermal cells.
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