Organisation Flashcards
1
Q
Organelle
A
A specialised unit within a cell which performs a specific function, e.g. nucleus
2
Q
Cell
A
The basic building block of all living organisms
3
Q
Tissue
A
A group of cells working together to perform a shared function, and often with similar structure
4
Q
Organ
A
A group of different tissues that work together to perform a particular function
5
Q
Organ System
A
A group of organisms that work together to perform a particular function
6
Q
Organism
A
Multiple organ systems working together to form an organism
7
Q
Catalyst
A
Any substance that speeds up the rate of a reaction without being changed or used up in the process
8
Q
Enzymes
A
Proteins that function as biological catalysts
9
Q
Epidermis Tissue
A
- Covers the whole plant
- Covered with a waxy cuticle
- Helps to reduce water loss by evaporation
10
Q
Palisade Mesophyll
A
- Found under the epidermis tissue
- Has lots of chlorophyll
- Positioned at the top of the leaf for more light
11
Q
Spongy Mesophyll Tissue
A
- Found under the palisade mesophyll
-Has lots of air spaces - Allows gases to diffuse in and out of cells
12
Q
Xylem
A
- Found in the roots, stems and leaves
- Made of dead cells
- Strengthened with lignin
- Transports water and minerals through a transpiration stream
- One direction (roots to leaves)
13
Q
Phloem
A
- Found in the roots stems and leaves
- Transport food
