Biology revision for quiz topic 1.1

Cell theory

• Organisms are composed of 1+ cells
• All cells arise from previously existing cells
• Basic/smallest unit of life

Atypical examples (questioning)

Striated muscle (skeletal muscle fibres)

One plasma membrane but many nuclei

Giant Algae

Unicellular but complex (3 anatomical parts)

Aceptate fungal hyphae

Large, nuclei, continuous cytoplasm

MR H GREN

Metabolism

Chemical reactions (ie respiration)

response

Reaction to stimuli/environment

Homeostasis

Constant internal environment ie pH

Growth

Limited

Reproduction

Asexual, sexual

Excretion/egestion

Removal of metabolic waste

Nutrition

Source of compounds for energy

Paramecium (eukaryotic)

Metabolism

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