B2- Plant Cell Organisation Flashcards
What are the main organs of a plant?
Roots, stems, and leaves
These organs work together to make organ systems.
What is epidermal tissue in plants?
Covers the whole plant
It serves as a protective 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 big air spaces for gas diffusion
It allows gases to diffuse in and out of cells.
What do xylem and phloem transport in plants?
Water, mineral ions, and food
They transport substances around the plant through roots, stems, and leaves.
What is meristem tissue responsible for?
Growth and differentiation into different types of plant cells
Found at the growing tips of shoots and roots.
What type of tissue helps reduce water loss by evaporation?
Epidermal tissue
It is covered with a waxy cuticle.
How does the upper epidermis of a leaf assist in photosynthesis?
It is transparent
This allows light to pass through to the palisade layer.
What role do chloroplasts play in leaves?
Site of photosynthesis
They are concentrated in the palisade mesophyll tissue.
What is the function of vascular bundles in leaves?
Deliver water and nutrients, support structure
Xylem and phloem form these bundles.
What are stomata?
Little holes for gas exchange
Located in the lower epidermis.
What controls the opening and closing of stomata?
Guard cells
They respond to environmental conditions.
What does ‘mesophyll’ mean?
Middle of a leaf
It refers to the tissue layers within the leaf.
Fill in the blank: The air spaces in _______ increase the rate of diffusion of gases.
spongy mesophyll tissue
This adaptation aids in gas exchange.
