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Lesson Worksheet: Structure of the Stem Biology
In this worksheet, we will practice describing the basic structure of a plant stem and recalling the functions of different parts of the stem.
For the following statements about plant stems, state whether they are true or false.
Transport systems in plant stems are crucial for providing leaves with the reactants they need to carry out photosynthesis.
Transport systems in plant stems will only transport water, minerals, and sugars to the lower half of the plant.
Which substance is the phloem primarily responsible for transporting?
- ACarbon dioxide
Which substance is the xylem primarily responsible for transporting?
- ACarbon dioxide
Which two tissues, involved in transport, make up the vascular bundle in plant stems?
- APhloem and cortex
- BXylem and pith
- CXylem and phloem
- DParenchyma and epidermis
The diagram provided shows a simplified structure of a dicotyledonous plant stem. The pith occupies the center of the stem and is comprised of parenchyma cells. What is the main purpose of the pith?
- ATo dissolve excess carbon dioxide
- BTo provide mechanical support to the stem
- CTo store and transport nutrients
- DTo break down or destroy dead plant cells
- ETo act as the site of respiration
The diagram provided shows a simplified structure of a dicotyledonous plant stem. What structure is indicated by the question mark?
The diagram provided shows a simplified structure of a dicotyledonous plant stem. Which two types of plant tissue make up the stem cortex?
- APhloem and xylem
- BParenchyma and collenchyma
- CParenchyma and pith
- DCollenchyma and epidermis
After the photosynthesis process, the transport of phloem sap would be inhibited in the absence of .
- Acompanion cells
- Cxylem vessels
In the leaves and non-woody stems of plants, the is the outer layer that is made up of barrel-shaped parenchyma cells and covered by a cuticle.
- Cmesophyll tissue
- Dvascular tissue