Embark on your journey to mastering GCSE Biology with these meticulously crafted revision notes tailored specifically for the Pearson Edexcel curriculum. Compiled by a top achiever who scored a high Grade 9 using these very notes as their only resource, this comprehensive guide covers all topics wi...
- Movement: By the action of muscles in animals and slow growth movements in
plants
- Respire: Release energy from their food
- Sensitivity: Sensitive to changes in their surroundings
- Homeostasis: Maintain a steady state inside the body
- Growth: Increase in size and complexity using materials from their food
- Reproduce: Produce offspring
- Excrete: Get rid of waste products
- Nutrition: Plants make their own food, animals eat other organisms
Diagram of Animal & Plant Cells:
- Cytoplasm is the living material that makes up a cell - it has a jelly like texture and is
between a solid and a liquid
- Cytoplasm contains many different organelles
Identify 2 differences between Animal & Plant Cells:
- Plant Cells have a cell wall whereas Animal Cells don’t
- Plant Cells have chloroplasts whereas Animals Cells don’t
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, Identify 3 common things between Animal & Plant Cells:
- They both contain Cytoplasm, a Nucleus and a Cell Membrane
Diagram of a Virus Cell:
- They are not a cell but are particles
- They have no nucleus or cytoplasm
How do Viruses work?
- They enter the host cell and take over the genetic machinery to make more virus
particles
- The host cell dies after many virus particles have been made and the particles are
released to infect more cells
Give an example of a Virus and what it infects:
- HIV (Human Immunodeficiency Virus) causes the illness AIDS (Acquired Immune
Deficiency Syndrome)
Why are Viruses not considered living?
- Viruses are not considered as living as they do not feed, respire, excrete, move, grow
or respond to their surroundings
- They are said to not carry out the normal characteristic of living things except
reproduction (done parasitically)
Cells Structure Table:
Bacteria Animal Plant Fungi Protoctists Virus
Nucleus No Yes Yes Yes Yes No
Cell Wall Yes No Yes Yes Rarely No
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