2.1 Principles of Organisation

• Arrange the levels of organisation in biology from simplest to most complex:

  1️⃣ Cells

  2️⃣ Tissues

  3️⃣ Organs

  4️⃣ Organ Systems

  5️⃣ Organisms
• Tissues are groups of similar cells working together


  True
• What is an organ composed of?

  Different tissues
• Organisms can be unicellular or multicellular

  True
• Prokaryotic cells lack a nucleus
• Ribosomes are the site of protein synthesis
• What are organelles in eukaryotic cells?

  Specialized structures with specific functions
• What is the role of organs in biological organization?

  Carry out complex tasks
• Match each level of organisation with its description:

  Cells ↔️ Basic structural units

  Tissues ↔️ Groups of similar cells

  Organs ↔️ Structures of different tissues

  Organ Systems ↔️ Groups of cooperating organs

  Organisms ↔️ Complete living beings
• How are cells organized at the tissue level in animals?

  Into four main types
• Muscle tissue contracts to cause movement, and it includes skeletal, smooth, and cardiac muscles.


  True
• What happens at the organ level in terms of tissue interaction?

  Tissues work together
• The lungs facilitate gas exchange and include epithelial, connective, and muscle tissues.

  True
• Arrange the levels of organization in biology from simplest to most complex:

  1️⃣ Cells

  2️⃣ Tissues

  3️⃣ Organs

  4️⃣ Organ Systems

  5️⃣ Organisms
• Groups of similar cells form tissues
• What are the two main types of cells?

  Prokaryotic and eukaryotic
• Prokaryotic cells lack a nucleus
• Which organelle controls cell activities and contains DNA?

  Nucleus
• Match the tissue type with its characteristic:

  Epithelial ↔️ Tightly packed cells

  Connective ↔️ Abundant extracellular matrix

  Muscle ↔️ Contains contractile fibers

  Nervous ↔️ Transmits electrical signals
• Which type of tissue supports and connects other tissues?

  Connective
• The lungs facilitate gas exchange and include epithelial, connective, and muscle tissues.

  True
• The circulatory system transports blood, oxygen, and nutrients
• Which organ system processes food and absorbs nutrients?

  Digestive system
• A well-functioning tissue depends on healthy cells.


  True
• The principles of organisation in biology outline how different levels of complexity are structured within living organisms
• Cells can be prokaryotic or eukaryotic
• Match the type of tissue with an example:

  Epithelial ↔️ Epithelium

  Connective ↔️ Cartilage

  Muscle ↔️ Muscle fibers

  Nervous ↔️ Nerves
• Organ systems cooperate to perform major bodily functions
• What are the two main types of cells?

  Prokaryotic and eukaryotic
• Match the cell type with its characteristics:

  Prokaryotic ↔️ Simple structure, circular DNA

  Eukaryotic ↔️ Complex structure, contains nucleus
• What does the cell membrane control?

  Entry and exit of substances
• Tissues are groups of similar cells working together
• Organ systems cooperate to perform major bodily functions


  True
• The heart contains cardiac muscle, connective, and nervous
• Epithelial tissue is characterized by covering surfaces, protecting, and secreting, as seen in the skin
• Match the tissue type with its primary function:

  Nervous ↔️ Transmits electrical signals

  Connective ↔️ Supports and connects other tissues

  Epithelial ↔️ Covers surfaces, protects, secretes

  Muscle ↔️ Contracts to cause movement
• The heart, an organ composed of cardiac muscle, connective, and nervous tissues, pumps blood
• Match the organ with its primary function:

  Heart ↔️ Pumps blood

  Lungs ↔️ Facilitates gas exchange

  Brain ↔️ Processes information
• What are the basic structural and functional units of living organisms?

  Cells
• Organs are structures composed of different types of tissues that perform specific functions.


  True