Plant Cell Organisation Flashcards
What are the main organs of a plant?
Stems, roots, leaves
These organs work together to form organ systems that perform essential tasks for plant survival.
What is epidermal tissue?
Covers the whole plant
Epidermal tissue serves as a protective layer for the plant.
What is the function of palisade mesophyll tissue?
Most photosynthesis occurs here
Palisade mesophyll contains many chloroplasts for efficient light absorption.
What is spongy mesophyll tissue and its role?
Contains big air spaces for gas diffusion
It allows gases to diffuse in and out of cells within the leaf.
What do xylem and phloem do?
Transport water, mineral ions, and food
They move substances around the plant through roots, stems, and leaves.
Where is meristem tissue found?
At the growing tips of shoots and roots
It is capable of differentiating into various types of plant cells.
What tissues make up a leaf?
Epidermal, mesophyll, xylem, and phloem
Each tissue type has specific functions contributing to the leaf’s overall role.
What is the function of the waxy cuticle on epidermal tissues?
Reduces water loss by evaporation
This adaptation helps the plant retain moisture.
Why is the upper epidermis of a leaf transparent?
To allow light to pass through to the palisade layer
This is essential for photosynthesis.
What do guard cells control?
The opening and closing of stomata
They respond to environmental conditions to regulate gas exchange.
What is the role of air spaces in spongy mesophyll tissue?
Increase the rate of gas diffusion
They facilitate efficient gas exchange within the leaf.
Fill in the blank: The palisade layer has lots of _______ where photosynthesis takes place.
chloroplasts
Chloroplasts are the sites of photosynthesis in plant cells.
True or False: The tissues of leaves are not adapted for efficient gas exchange.
False
The structure of leaf tissues is specifically designed to enhance gas exchange.
What is the function of vascular bundles in leaves?
Deliver water and nutrients and support the structure
Vascular bundles contain xylem and phloem for transport.
