Organisation And Levels Of Organisation Flashcards
Types of cells
Eukaryotic
Prokaryotic
Eukaryotic features
True nucleus
Organells surrounded by membrane
Larger than Prokaryotic cells
Prokaryotic features
No true nucleus, DNA strand
No organells
Smaller than Eukaryotic cells
Name the 5 Kingdoms
Prokaryotae
Protoctista
Fungi
Animalea
Plantae
Features of Prokaryotae or Bacteria
Unicellular
No nucleus
Asexual
Heterotrophic or Autotrophic
Features of Protoctista
Unicellular or Multicellular
Nucleus
Heterotrophic or Autotrophic
Features of Fungi
Multicellular except yeast
Nucleus
Chitin cell wall
Reproduce through spores
Features of Animalae
Multicellular
Nucleus
No cell wall
Heterotrophic
Features of Plantae
Multicellular
Nucleus
Photosynthesis (Autotrophic)
Asexually
Cellulose cell wall
Levels of organisation
Organelle
Cell
Tissue
Organ
Organ system
Organisms
Function of a ciliated cell in the trachea and fallopian tubes
Trachea- beat or flick mucus out of the respiratory system
Fallopian tubes- moves flick egg to the uterus
Specialisation of the red blood cell
small and flexible- can fit through narrow vessels
bi-concave shape- maximises their surface area to absorb oxygen
thin membrane- so gases easily diffuse through
contain haemoglobin- binds to oxygen.
Specialisation of a root hair cell
Finger like projection or extension
To extend surface area for maximum absorption of water and mineral salts
Specialisation of the Xylem
Made of ligin or dead hollow cells
For fast transportation of water and mineral salts
3 major tenets of cell theory
- Cells are the basic structural unit in living organisms
- All livings organisms are made up of at least one cell
- All cells develop from pre-existing cells
Function of Chloroplast
Site of photosynthesis
Contains chlorophyll
Function of chlorophyll
Green pigment in plants
Absorb sunlight
Function of mitochondria
Site of ATP synthesis
ATP is released to provide energy for the cells reactions
Function of cytoplasm
Jelly like fluid that stores or holds the organells of the cell
Providee physical structure to the cell
Function of vacuole
Stores salts, ions, sugars, cell sap
Keeps cell turgid
Controls the water content of the cell
Function of the cell membrane
Selectively permeable
Controls the movement of substances in and out the cell
Function of cell wall
Provides mechanical structure
Resists tugor pressure
Made up of cellulose
Function of the nucleus
Controls all the activities of the cell
Store genetic material
Function of Rough ER
Transport mRNA from the nucleus to the ribosomes
Transport proteins
Function of Ribosomes
Site for protein synthesis
Makes proteins
Function of Golgi bodies
Produces secretory vesicles
Function of secretory vesicles
Store, transport, and digest cellular products and waste
What are Lysosomes
Digestive enzymes that breaks down all types of biological polymers