4.2.3 Plant tissues, organs and systems Flashcards
What are the main types of plant tissues?
The main types of plant tissues include epidermal tissues, palisade mesophyll, spongy mesophyll, xylem, phloem, and meristem tissue found at the growing tips of shoots and roots.
What is the role of the leaf in plants?
The leaf is a plant organ.
What should students be able to explain about root hair cells, xylem, and phloem?
Students should be able to explain how the structure of root hair cells, xylem, and phloem are adapted to their functions.
What factors affect the rate of transpiration?
Changing temperature, humidity, air movement, and light intensity affect the rate of transpiration.
How can the rate of transpiration be measured?
The rate of transpiration can be measured by the uptake of water.
What is the function of root hair cells?
Root hair cells are adapted for the efficient uptake of water by osmosis and mineral ions by active transport.
What does xylem tissue do?
Xylem tissue transports water and mineral ions from the roots to the stems and leaves.
What is the structure of xylem tissue?
Xylem is composed of hollow tubes strengthened by lignin, adapted for the transport of water in the transpiration stream.
What is the role of stomata and guard cells?
The role of stomata and guard cells is to control gas exchange and water loss.
What does phloem tissue transport?
Phloem tissue transports dissolved sugars from the leaves to the rest of the plant for immediate use or storage.
What is translocation?
The movement of food molecules through phloem tissue is called translocation.
What is the structure of phloem tissue?
Phloem is composed of tubes of elongated cells, and cell sap can move from one phloem cell to the next through pores in the end walls.
What is not required regarding phloem tissue?
Detailed structure of phloem tissue or the mechanism of transport is not required.
