Anatomy Of Flowering Plants Flashcards
(23 cards)
What are the two main types of vascular tissues in the vascular system?
Phloem and xylem.
What is the difference between open and closed vascular bundles?
Open vascular bundles have cambium and can form secondary tissues, while closed vascular bundles lack cambium and do not form secondary tissues.
What arrangement of xylem and phloem is referred to as radial?
When xylem and phloem are arranged in an alternate manner along different radii.
In which type of plants are conjoint vascular bundles commonly found?
Dicotyledonous plants.
What is the outermost layer of a dicotyledonous root called?
Epiblema.
What are unicellular projections from the epiblema in roots called?
Root hairs.
What is the innermost layer of the cortex in a dicot root called?
Endodermis.
What material is deposited in the walls of endodermal cells?
Suberin.
What is the function of the pericycle in dicot roots?
Initiation of lateral roots and vascular cambium during secondary growth.
How many xylem bundles are typically found in a monocot root?
More than six (polyarch).
Do monocotyledonous roots undergo secondary growth?
No.
What type of tissue is the epidermis in a dicotyledonous stem?
Protective layer.
What are the three sub-zones of the cortex in a dicot stem?
- Hypodermis
- Cortex
- Endodermis.
What is the function of collenchymatous cells in the hypodermis?
Provide mechanical strength.
In a typical dicot stem, where is the phloem located in relation to the xylem?
On the outer side of xylem.
What type of vascular bundles are found in dicot stems?
Conjoint, open, and endarch protoxylem.
What is the central portion of a dicot stem made up of?
Pith.
What characterizes the vascular bundles in a monocot stem?
Scattered and surrounded by a sclerenchymatous bundle sheath.
What is the main difference between dorsiventral and isobilateral leaves?
Stomata are present on both surfaces in isobilateral leaves.
What are bulliform cells and their function in monocot leaves?
Large, empty, colorless cells that help minimize water loss by curling the leaf when flaccid.
What type of venation is typical in monocot leaves?
Parallel venation.
The tissue between the upper and lower epidermis in leaves is called what?
Mesophyll.
What are the two types of mesophyll cells in a dorsiventral leaf?
- Palisade parenchyma
- Spongy parenchyma.
