Plant Cell Organisation Flashcards
Organisation (17 cards)
What are the main organs of a plant?
Stems, roots, and leaves
These organs work together to form organ systems that perform essential tasks for plant survival and growth.
What is the function of plant organs?
They perform various tasks necessary for survival and growth, such as transporting substances around the plant.
This includes water, mineral ions, and food.
What are tissues in plants made of?
Plant organs are made of tissues.
Different types of tissues perform specific functions.
What type of tissue covers the whole plant?
Epidermal tissue
This tissue serves as a protective outer layer.
Where does most photosynthesis occur in a leaf?
Palisade mesophyll tissue
This tissue contains a high concentration of chloroplasts.
What is the function of spongy mesophyll tissue?
Contains large air spaces to allow gases to diffuse in and out of cells.
It facilitates gas exchange within the leaf.
What do xylem and phloem transport?
Water, mineral ions, and food
They are crucial for nutrient distribution throughout the plant.
Where are meristematic tissues found?
At the growing tips of shoots and roots
These tissues can differentiate into various types of plant cells.
What is the role of the epidermal tissue in leaves?
Covered with a waxy cuticle to reduce water loss by evaporation.
This adaptation helps maintain moisture within the leaf.
Why is the upper epidermis of a leaf transparent?
To allow light to pass through to the palisade layer.
This maximizes light absorption for photosynthesis.
What is the significance of chloroplasts in the palisade layer?
They are where photosynthesis takes place.
Their location near the top of the leaf ensures they receive ample light.
What do vascular bundles in leaves consist of?
Xylem and phloem
They deliver water and nutrients and help support the leaf structure.
What are stomata?
Tiny holes in the lower epidermis that allow CO2 to diffuse into the leaf.
They are essential for gas exchange.
What controls the opening and closing of stomata?
Guard cells
These cells respond to environmental conditions to regulate gas exchange.
What is the role of air spaces in spongy mesophyll tissue?
Increase the rate of diffusion of gases.
This adaptation aids in effective gas exchange.
Fill in the blank: Plant organs work together to make _______.
organ systems
True or False: Xylem and phloem are not involved in transporting nutrients in plants.
False
They play a critical role in nutrient transport.
