Saturday, June 24, 2017

1.1: Understand that living Organisms share the following Characteristics:

LETTER
DESCRIPTION
M - MOVEMENT
All Living Organisms Move
R - RESPIRATION
All Living Organisms will Inhale and Exhale
S - SENSITIVITY
All Living Organisms will Respond to Stimuli
G - GROWTH
All Living Organisms will Grow
R - REPRODUCTION
All Living Organisms will Reproduce
E - EXCRETION
All Living Organisms will Excrete Waste
N - NUTRITION
All Living Organisms Require Nutrition

1.2: Describe the common features shared by organisms within the following main groups: Plants, Animals, Fungi, Bacteria, Proctists and Viruses

GROUPS OF ORGANISMS
small.pngPLANTS:
  • Multicellular Organisms
  • Stores Carbohydrates as Starch
  • Cells contain Chloroplasts; carries out
          Photosynthesis
  • Cell walls are made of Cellulose
  • Example: Herbaceous Legume
ANIMALS
  • small-1.pngMulticellular Organisms
  • Stores Carbohydrates as Glycogen
  • Cells DO NOT contain Chloroplasts; cannot carry out photosynthesis
  • No Cell walls
  • Nervous Coordination: Can move from one place to another
  • Example: Mammals and Insects

large-1.pngFUNGI
  • Both Multicellular and Unicellular
  • Stores Carbohydrates as Glycogen
  • Cell walls are made of Chitin
  • DO NOT carry out Photosynthesis
  • Organised into a Mycelium: Thread-like structure called Hyphae, which contains many Nuclei
  • They feed by Extracellular Secretion: Releases digestive enzymes onto food and absorb organic products ( saprotrophic nutrition )
  • Example: Mucor / Yeast

large-2.pngBACTERIA
  • Unicellular Organisms
  • Lack in Nuclei’s so has circular chromosomes of DNA called Plasmids
  • Has Cell wall, Cell membrane, Cytoplasm
  • SOME can carry out Photosynthesis
  • Feeds by eating living or dead living Organisms
  • Example: Lactobacillus Bulgaricus (Yoghurt Production)

PROCTISTS
  • 305dd0d8b7394821f7f29f368a7ae6cd.gifMicroscopic Unicellular Organisms
  • Example: Animals: Amoeba
                           Plants: Chlorella


VIRSUS
  • Simple_diagram_of_virus_(en).svg.pngSmall Particles ( smaller than Bacteria )
  • Parasitic: can only reproduce in living Organisms
  • They only reproduce infect every type of living Organisms
  • They have a wide variety of shapes and sizes
  • No Cellular structure
  • Has protein coat
  • Contains one type of Nucleic Acid ( RNA or DNA )
  • Example: Tobacco Mosaic Virus / HIV
                           Plants: Chlorella

1.3: Recall the term ‘Pathogen’ and know that Pathogens may be Fungi, Bacteria, Protoctists or Viruses

PATHOGENS: Micro-organisms that causes Diseases

COMMON PATHOGENS
large-1.pngFUNGI
  • Both Multicellular and Unicellular
  • Stores Carbohydrates as Glycogen
  • Cell walls are made of Chitin
  • DO NOT carry out Photosynthesis
  • Organised into a Mycelium: Thread-like structure called Hyphae, which contains many Nuclei
  • They feed by Extracellular Secretion: Releases digestive enzymes onto food and absorb organic products ( saprotrophic nutrition )
  • Example: Mucor / Yeast

large-2.pngBACTERIA
  • Unicellular Organisms
  • Lack in Nuclei’s so has circular chromosomes of DNA called Plasmids
  • Has Cell wall, Cell membrane, Cytoplasm
  • SOME can carry out Photosynthesis
  • Feeds by eating living or dead living Organisms
  • Example: Lactobacillus Bulgaricus (Yoghurt Production)

PROCTISTS
  • 305dd0d8b7394821f7f29f368a7ae6cd.gifMicroscopic Unicellular Organisms
  • Example: Animals: Amoeba
                           Plants: Chlorella


Simple_diagram_of_virus_(en).svg.pngVIRSUS
  • Small Particles ( smaller than Bacteria )
  • Parasitic: can only reproduce in living Organisms
  • They only reproduce infect every type of living Organisms
  • They have a wide variety of shapes and sizes
  • No Cellular structure
  • Has protein coat
  • Contains one type of Nucleic Acid ( RNA or DNA )
  • Example: Tobacco Mosaic Virus / HIV
                         Plants: Chlorella

2.1: Describe the levels of Organisation within Organisms: Organelles, Cells, Tissues, Organs and Systems

LEVELS OF ORGANISATION:

LEVEL
DESCRIPTION
ORGANELLES
Cell Structures Specialized with a Specific fFunction
CELLS
Basic Functional and Structural Units in a Living Organism
TISSUES
Made from Same Cells carrying out the Same Function
ORGANS
Made from Similar Tissues carrying out the Same Function
SYSTEMS
Made from Organs carrying out Body Function

2.2: Describe Cell Structures, including the Nucleus, Cytoplasm, Cell Membrane, Cell Wall, Chloroplast and Vacuole

CELL STRUCTURE:

CELL STRUCTURE
DESCRIPTION
NUCLEUS
Membrane Organelle that contains Genetic Material
CYTOPLASM
Material within a Living Cell, Excluding the Nucleus
CELL MEMBRANE
Semi-Partially Permeable Membrane surrounding Cytoplasm of Cell
CELL WALL
A Membrane of the Cell that forms external to the Cell Membrane which is made from Cellulose
CHLOROPLAST
Plastid in Green Plant cells, which contains Chlorophyll
VACUOLE
Space in the Cytoplasm of a Cell, contains fluid

2.4: Compare Structures of Plant and Animal cells

STRUCTURE OF PLANT AND ANIMAL CELL:

PLANT CELL
ANIMAL CELL
Fixed Shape
No Fixed Shape
Large Vacuole
Little or no Vacuole
Cell Wall
No Cell Wall
Contains Chloroplasts (can conduct Photosynthesis)
Does not contain Chloroplasts (No Photosynthesis)

2.3: Describe the Functions of the Nucleus, Cytoplasm, Cell Membrane, Cell Wall, Chloroplast and Vacuole

FUNCTION:

CELL STRUCTURE
FUNCTION
NUCLEUS
Contains Genetic Material
CYTOPLASM
Where Chemical Reactions take place, Keeps Organelles in place and fills the Cell
CELL MEMBRANE
Controls what Substances goes in and out of the Cell
CELL WALL
Holds the Cellular Structure
CHLOROPLAST
Allows Photosynthesis to take place
VACUOLE
Holds Fluid and Cellular Waste