Unit C: Section 3.0 Flashcards
What are the advantages and disadvantages of having a large structure?
- Division of labour
- Size
- Interdependence of cells
How is division of labour an advantage?
-Specialized cells perform more efficiently
How is size a disadvantage?
-The surface area to volume ratio and the related rate of diffusion restricts the size of unicellular organisms
How is size an advantage?
- In multicellular organisms, internal support structures allow for the efficient exchange of materials
- These permit the organisms to grow a larger size
How is the interdependence of cells an advantage in multi-cellular organisms?
-If one cell dies the organism can still function
How is the interdependence of cells a disadvantage in multi-cellular organisms?
If one cell malfunction it could be possible that as it increases the whole organism could suffer
What are tissues?
Groups of cells performing the same function together
What are organs?
Tissues contributing to the same function
What are Systems?
A set of organs that perform a function
What are the 2 organ systems of a plant?
- Shoot System
- Root System
What is the shoot system?
Every part of the plant above the ground
What is included in the shoot system of a plant?
Stem Leaves Buds Flowers Fruits *Tubers*
What are tubers?
Enlarged, underground stem that stores food
What is the root system?
Every part of the plant that is underground
What do cells divide for in plants?
The growth of new tissue and repair of damaged tissue
What is mitosis?
The process of cell division that allows growth and repair. One cell literally divides into 2
What are meristems?
Regions in plants where cell division occurs
What are the 4 types of tissues in plants?
- Dermal/Epidermis tissue
- Ground tissue
- Vascular tissue
- Phloem tissue
What is Dermal/Epidermis tissue?
-The outer layers of cells that covers all non-woody plants
How many cells thick is the Dermal/Epidermal tissue?
1 cell layer thick
What is the Dermal/Epidermal Tissue responsible for?
The exchange of matter and gasses in and out of the plant
What is the Epidermis in woody plants?
It is replaced by cork and bark during the secondary growth stage and development
What system is the Dermal tissue a part of?
The Shoot System
What does the Dermal tissue do in the shoot system?
- Primarily involved in gas exchange of carbon dioxide and oxygen
- Protects plants from disease