National 5 Biology - BBC Bitesize

Overview

The BBC Bitesize platform provides resources suitable for National 5 Biology students. This includes various topics with interactive quizzes and detailed guides.

Key Topics

Cell Structure

• Cells are microscopic building blocks of organisms.
• Differences and similarities among animal, plant, fungal, and bacterial cells.

Transport Across Membranes

• Cells are enclosed by a selectively permeable membrane.
• Molecules move through diffusion, active transport, and osmosis.

DNA and Protein Production

• DNA carries genetic information for protein assembly.
• Proteins are made from amino acids and include enzymes, hormones, and antibodies.

Genetic Engineering

• Transfer of DNA between organisms using biotechnology.

Respiration

• Cellular process of releasing energy from food and storing it as ATP.

Producing New Cells

• Cell division allows growth and replacement of dead cells.

Control and Communication

• Involves nerve impulses and hormones for cell communication.
• Central nervous system enables rapid response.

Reproduction

• Fusion of male and female gametes.
• Gametes production in mammalian and plant reproductive structures.

Variation and Inheritance

• Phenotype determined by allele combinations.

Transport Systems

• Plants: Use xylem and phloem for transport.
• Animals: Heart and blood vessels used for transport.

Absorption of Materials

• Gas exchange in lungs and nutrient absorption in digestive system.

Ecosystems

• Community of organisms and their environment.
• Covers energy transfer, niches, and competition.

Distribution of Organisms

• Abiotic and biotic factors influencing diversity and distribution.
• Use of sampling for estimation.

Photosynthesis

• Process by which plants use sunlight to produce food.

Energy in Ecosystems

• Feeding relationships shown in food chains.
• Includes pyramids of biomass, energy, and numbers.

Food Production

• Increased demand due to population growth.
• Intensive farming impacts on the environment.

Evolution of Species

• Mutations introduce genetic variety.

Apparatus and Techniques

• Knowledge of biological apparatus and experimental techniques required.

Media and Resources

• Interactive quizzes and guides are available for each topic.
• Videos accompany many of the topics to provide additional explanations.