Questions and Answers
What is the primary function of xylem in plants?
Which of the following statements is true regarding phloem cells?
What distinguishes xylem from phloem in terms of cell viability?
Which method of transport requires energy?
Signup and view all the answers
How does the transport direction differ between xylem and phloem?
Signup and view all the answers
What role do phloem sclerenchyma cells play in plants?
Signup and view all the answers
What occurs as a result of diffusion in cell membranes?
Signup and view all the answers
What is the primary component of a vascular bundle in plants?
Signup and view all the answers
Which of the following is NOT a method by which substances move across the cell membrane?
Signup and view all the answers
Which component of phloem is primarily responsible for food transport?
Signup and view all the answers
Study Notes
Differences between Xylem and Phloem
- Xylem conducts water and minerals from roots to other plant parts.
- Phloem transports food from leaves to all plant sections.
- Xylem is made up of xylem vessels, tracheids, parenchyma, and sclerenchyma.
- Phloem consists of sieve tube cells, companion cells, phloem parenchyma, and phloem sclerenchyma.
- Most xylem cells are dead, except for parenchyma cells.
- Most phloem cells are alive, with the exception of sclerenchyma.
- Xylem transport is unidirectional, while phloem transport can be bidirectional.
- Transport in xylem does not require energy input.
- Phloem transport requires energy for movement of substances.
Phloem Cell Types
- Phloem parenchyma cells are thin-walled and involved in food transport and storage.
- They are typically located at the ends of sieve tubes.
- Phloem sclerenchyma cells are dead, with thick walls providing mechanical support to the plant.
Functions of Phloem
- Conducts food from leaves to various plant parts, including storage in roots and stems.
- Provides mechanical support through sclerenchyma cells.
Vascular Tissues
- Vascular tissues (xylem and phloem) often form vascular bundles.
- Vascular bundles generally consist of xylem on the inside and phloem on the outside.
Methods of Transport
- Plant transport relies on movement across the selectively permeable cell membrane.
- Substances move via diffusion, osmosis, and active transport.
Diffusion
- Diffusion describes the movement of substances from areas of higher concentration to lower concentration.
- It continues until a uniform concentration is achieved.
- Energy expenditure is not required for diffusion.
- Concentration refers to the amount of a substance within a specific area or mixture.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the fundamental differences between xylem and phloem in plants. This quiz covers their functions, structures, and components. Test your knowledge on how water and nutrients are transported within plants!